tim x biet
X+35=-22-X
(6X-4^2) .7^8=2.7^9
5.3^x-1-7.3^12=8.3^12
3.(x-15)^3=-24
lx+18l=10
Tim X
3) -12 + (2x – 9) + x= 0
4) 11 + (15 - x) = 1
5) 4 - (27 - 3) = x - (13 - 4)
6) 8 - (x - 10) = 23 - (- 4 +12)
7) 105 – 5(10 – 5x) = -20
8) (x -1)(8-2x)(3x+123) = 0
9) (x2 - 25)(x+ 10) = 0
10) x(x2+5) =
3) \(-12+2x-9+x=0\\ -21+3x=0\\ 3x=21\\ x=7\)
4)
\(11+\left(15-x\right)=1\)
\(15-x=1-11\)
\(15-x=-10\)
\(x=15-\left(-10\right)\)
\(x=25\)
5)
\(4-\left(27-3\right)=x-\left(13-4\right)\)
\(4-24=x-9\)
\(x-9=-20\)
\(x=-20+9\)
\(x=-11\)
\(3.-12+\left(2x-9\right)+x=0.\)
\(\Leftrightarrow-12+2x-9+x=0.\Leftrightarrow3x=21.\Leftrightarrow x=7.\)
Vậy \(x=7.\)
\(4.11+\left(15-x\right)=1.\Leftrightarrow11+15-x=1.\Leftrightarrow26-x=1.\Leftrightarrow x=25.\)
Vậy \(x=25.\)
\(5.4-\left(27-3\right)=x-\left(13-4\right).\Leftrightarrow4-24=x-9.\Leftrightarrow-20=x-9.\Leftrightarrow x=-11.\)
Vậy \(x=-11.\)
\(6.8-\left(x-10\right)=23-\left(-4+12\right).\Leftrightarrow8-x+10=23-8.\Leftrightarrow18-x=15.\Leftrightarrow x=3.\)
Vậy \(x=3.\)
\(7.105-5\left(10-5x\right)=-20.\Leftrightarrow105-50+25x=-20.\Leftrightarrow25x=-75.\Leftrightarrow x=-3.\)
Vậy \(x=-3.\)
\(8.\left(x-1\right)\left(8-2x\right)\left(3x+123\right)=0.\)
\(\Leftrightarrow\left[{}\begin{matrix}x-1=0.\\8-2x=0.\\3x+123=0.\end{matrix}\right.\Leftrightarrow\left[{}\begin{matrix}x=1.\\x=4.\\x=-41.\end{matrix}\right.\)
Vậy \(x\in\left\{1;4;-41\right\}.\)
\(9.\left(x^2-25\right)\left(x+10\right)=0.\)
\(\Leftrightarrow\left(x-5\right)\left(x+5\right)\left(x+10\right)=0.\)
\(\Leftrightarrow\left[{}\begin{matrix}x-5=0.\\x+5=0.\\x+10=0.\end{matrix}\right.\Leftrightarrow\left[{}\begin{matrix}x=5.\\x=-5.\\x=-10.\end{matrix}\right.\)
Vậy \(x\in\left\{5;-5;-10\right\}.\)
\(10.x\left(x^2+5\right)=0.\Leftrightarrow x=0.\)
a) 5(x+35)=515
b) 12x-33=3².3³
c) 6.x-5=19
d) 4.(x-12)+9=17
e) 123-5.(x+4)=38
f) (3x-2⁴).7³=2.7⁴
`@` `\text {Ans}`
`\downarrow`
`a)`
`5(x + 35) = 515`
`=> x + 35 = 515 \div 5`
`=> x+ 35 = 103`
`=> x = 103 - 35`
`=> x = 68`
Vậy, `x = 68`
`b)`
`12x - 33 = 3^2 * 3^3`
`=> 12x - 33 = 3^5`
`=> 12x = 3^5 + 33`
`=> 12x = 276`
`=> x = 276 \div 12`
`=> x = 23`
Vậy, `x = 23`
`c)`
`6x - 5 = 19`
`=> 6x = 19 + 5`
`=> 6x = 24`
`=> x = 24 \div 6`
`=> x = 4`
Vậy, `x = 4`
`d)`
`4(x - 12) + 9 = 17`
`=> 4(x - 12) = 17 - 9`
`=> 4(x - 12) = 8`
`=> x - 12 = 8 \div 4`
`=> x - 12 = 2`
`=> x = 14`
Vậy, `x = 14`
`e)`
123 - 5(x + 4) = 38`
`=> 5(x + 4)= 123 - 38`
`=> 5(x + 4) =85`
`=> x + 4 = 85 \div 5`
`=> x + 4 = 17`
`=> x = 13`
Vậy, `x = 13`
`f)`
`(3x - 2^4) * 7^3 = 2 * 7^4`
`=> 3x - 2^4 = 2 * 7^4 \div 7^3`
`=> 3x - 2^4 = 2* 7`
`=> 3x - 2^4 = 14`
`=> 3x = 14 + 2^4`
`=> 3x = 30`
`=> x = 30 \div 3`
`=> x = 10`
Vậy, `x = 10.`
lxl<6
5<x<11
tim x biet
5x+15=0
1-2x=37
x+35=-22-x
( 6x-4^2).7^8=2x7^9
a) 5x=-15 <=> x=-3
b) 1-2x=37 <=> 2x=-36 <=> x=-18
c) 2x=-57 <=> x=-57/2
\(\left(6x-16\right).7^8=2.7.7^8\Leftrightarrow6x-16=14\Leftrightarrow6x=30\Leftrightarrow x=5\)
2/3 + 3/4
9/4 + 3/5
5/24 + 1/4
3/15 - 5/35 18/27 - 2/6 37/12 - 3
11/9 x 3/22 7/13 x 13/7 4 x6/7
2/5 : 3/10 3/8 : 9/4 8/21 : 4/7
2/3 + 3/4=17/12
9/4 + 3/5=57/20
5/24 + 1/4=11/24
3/15 - 5/35=2/35 18/27 - 2/6=1/3 37/12 - 3=1/12
11/9 x 3/22=1/6 7/13 x 13/7=1 4 x6/7=24/7
2/5 : 3/10=4/3 3/8 : 9/4=1/6 8/21 : 4/7=2/3
2/3 + 3/4
= 17/12
9/4 + 3/5
= 57/20
5/24 + 1/4
=11/24
3/15 - 5/35
=2/35
18/27 - 2/6
=1/3
37/12 - 3
= 1/12
11/9 x 3/22
=1/6
7/13 x 13/7
=1
4 x6/7
=24/7
2/5 : 3/10
=4/3
3/8 : 9/4
=1/6
8/21 : 4/7
= 2/3
1=17/12
2=57/20
3=11/24
4=2/35 7=1/3 10=1/12
5=1/6 8=1 11=24/7
6=4/3 9=1/6 12=2/3
a/48.2012+2012+2012
b/15/16:3/8.3/4
c/1234.1236-1/1233+1234x1235
B.2/tim X
a/x:36-5=12
b/22/5:x=44/5:5/2
c/8,35.x+6,65.x=45
d/3/5-x+1/3=1/4
X - 2/3 - 2/15 - 2/35 - 2/63 =1/9
9=(1/2+2/3+3/4+5/6+7/12) nhận 3/10+ x
22/3 x 2/5 x 3/8 x 10 x 23/92
Cốm gắng giúp tới hết ak tới đang cần gấp
Từng dòng là 1 bài nhé mọi nguoiwf jup Mk nhanh vs
Bài 1: Tìm x [GIÚPPPPPPPPPPPPPPPPPPP]
1) 5 – (10 – x) = 7
2) - 32 - (x – 5) = 0
3) -12 + (2x – 9) + x= 0
4) 11 + (15 - x) = 1
5) 4 - (27 - 3) = x - (13 - 4)
6) 8 - (x - 10) = 23 - (- 4 +12)
7) 105 – 5(10 – 5x) = -20
8) (x -1)(8-2x)(3x+123) = 0
9) (x2 - 25)(x+ 10) = 0
10) x(x2+5) = 0
\(1\)) \(5-\left(10-x\right)=7\)
\(10-x=5-7\)
\(10-x=-2\)
\(x=10-\left(-2\right)\)
\(x=12\)
\(2\)) \(-32-\left(x-5\right)=0\)
\(x-5=-32-0\)
\(x-5=-32\)
\(x=-32+5\)
\(x=-27\)
1)10-x=5-7
x=10-(-2)
x=12
2)x+5=0+32
x=32-5
x=27
3) -12+2x-9+x=0
-12+(2x+x-9)=0
3x-9=0+12
3x=12+9
x=21:3
x=7
4) 15-x=1-11
x=15-(-10)
x=25
5) 4-(27+3)=x-9
4-30=x-9
-26+9=x
x=-17
Tìm số nguyên x biết rằng :
1) x-7=-5
2) |x| = 3
3) | x|+5 = 8
4) 8-x=12
5) 6x-39=5628:28
6) 8\(^2\)+(200-x) = 123
7) x+10=-14
5x-12 = 48
1) x-7=-5 => x=-5+7 = 2
2) |x|=3 => x =3 hoặc x = -3
3) |x|+5=8 => |x| = 8-5=3
=> x = 3 hoặc x = -3
4) 8-x = 12 => x = 8-12 = -4
5) 6x-39=5628:28
=> 6x-39=201
=> 6x = 201+39
=> 6x = 240
=> x = 40
6) 82+(200-x) = 123
=> 200-x = 123 - 64
=> 200-x = 59
=> x = 200-59
=> x = 141
7) x+10 = -14
=> x = -14 - 10
=> x = -24
8) 5x-12 = 48
=> 5x = 48+12
=> 5x = 60
=> x = 12
1) x = 2
2) x = 3 hoặc x = -3
3) x = 3 hoặc x = -3
4) x = -4
5) x = 40
6) x = 141
7) x = -24
8) x = 12
1) x - 7 = - 5
x = - 5 + 7
x = 2
2) lxl = 3
x = 3 hoặc x = -3
3) lxl + 5 = 8
lxl = 8 - 5
lxl = 3
x = 3 hoặc x = -3
4) 8 - x = 12
x = 8 + (- 12)
x = -4
5) 6x - 39 = 5628 : 28
6x - 39 = 201
6x = 201 + 39
6x = 240
x = 240 : 6
x = 40
6) 82 + ( 200 - x ) = 123
64 + ( 200 -x ) = 123
200 - x = 123 - 64
200 -x = 59
x = 200 - 59
x = 141
7) x + 10 = -14
x = -14 - 10
x = (-14) + (-10)
x = -24
8) 5x -12 = 48
5x = 48 + 12
5x = 60
x = 60 : 5
x = 12
k cho mk nha mn
hihii heheh hahaa
1. Tinh cac tong sau :
A = 1 + 3 + 7 + ... + 101
M = 16 - 18 + 20 - 22 + 24 - 26 + ... + 64 - 66 + 68
H = ( 1 + 2 + 3 + ... + 99 ) x ( 13 x 15 - 12 x 15 - 15 )
G = 1 + 2 - 3 - 4 + 5 + 6 - 7 - 8 + 9 + 10 - 11 - 12 + 13 + 14 - ... + 301 + 302
2. Tim x biet :
a) 1 + 2 + 3 + 4 + ... + 99 + 100 + 2 x X = 5052
Ai giai duoc chi tiet cac bai nay minh tick lien 10 tick hi hi hi !!!!!!
Ta có:
A = 1 + 3 + 5 + 7 +... + 101
A = \(\frac{102.51}{2}=2601\)
M = 16 - 18 + 20 - 22 + 24 - 26 + .. + 64 - 66 + 68
M = ( 16 - 18 ) + ( 20 - 22 ) + ( 24 - 26 ) + ... + ( 64 - 66 ) + 68
M = (- 2 + - 2 + -2 + ... + - 2 ) + 68
M = 25/2 . ( - 2 ) + 68
M = -25 + 68
M = 43
H = ( 1 + 2 + 3 +...+ 99 ) x ( 13 x 15 - 12 x 15 - 15 )
H = ( 1 + 2 + 3 +...+ 99 ) x { (13 - 12 - 1) x 15 }
H = ( 1 + 2 + 3 +...+ 99 ) x 0
H = 0
G = 1 + 2 - 3 - 4 + 5 + 6 - 7 - 8 + 9 + 10 - 11 - 12 + 13 + 14 - ... + 301 + 302
G = ( 1 + 2 ) + ( -3 - 4 ) + ( 5 + 6 ) + ( -7 - 8 ) + ( 9 + 10 ) + ( - 11 - 12 ) + ( 13 + 14 ) -...+ ( 301 + 302 )
G = ( 3 - 7 ) + ( 11 - 15 ) + ( 19 - 23 ) + 27 - ... + 603
G = -4 + - 4 + -4 + 27 - ... + 603
G = 75 x ( -4 ) + 603
G = -300 + 603
G = 303
2.
a) 1 + 2 + 3 + 4 +...+ 99 + 100 + 2 x X = 5052
= > \(\frac{100.101}{2}\)+ 2 x X = 5052
= > 5050 + 2 x X = 5052
= > 2X = 2
= > X = 1
bui thi huyen chi nào vậy
Ai đấy tôi ko biết
Trên đời có mỗi tui Là Bùi Thị Huyền Chi thoy
Ko có ng thứ 2 đâu