tìm x :
a) 12 + ( 5 + x ) = 20
b) 120 + ( 50 + x ) = 180
c) 175 + ( 30 - x ) = 200
d) 130 - ( 100 + x ) = 25
e) 145 - ( 125 + x ) = 12
j) 5 ( x + 12 ) + 22 = 92
g) 3 ( x + 23 ) + 6 = 96
giúp mk nha mn mk cần gấp
Tìm x, biết
a) 70 - (x - 3) = 45; b) 12 + (5 + x) = 20
c) 130 - (100 + x) = 25; d)175 + (30 - x) = 200
e) (x + 12) + 22 = 92; f) 95 - (x + 2) = 45
a) \(70-\left(x-3\right)=45\)
\(x-3=70-45\)
\(x-3=25\)
\(x=25+3\)
\(x=28\)
b) \(12+\left(5+x\right)=20\)
\(5+x=20-12\)
\(5+x=8\)
\(x=8-5\)
\(x=3\)
c) \(130-\left(100+x\right)=25\)
\(100+x=130-25\)
\(100+x=105\)
\(x=105-100\)
\(x=5\)
d) \(175+\left(30-x\right)=200\)
\(30-x=200-175\)
\(30-x=25\)
\(x=30-25\)
\(x=5\)
e) \(\left(x+12\right)+22=92\)
\(x+12=92-22\)
\(x+12=70\)
\(x=70-12\)
\(x=58\)
f) \(95-\left(x+2\right)=45\)
\(x+2=95-45\)
\(x+2=50\)
\(x=50-2\)
\(x=48\)
a)
70 - (x - 3) = 45
x - 3 = 70 - 45 = 25
x = 25 + 3 = 28
Vậy x = 28
b)
12 + (5 + x) = 20
5 + x = 20 - 12 = 8
x = 8 - 5 = 3
Vậy x = 3
c)
130 - (100 + x) = 25
100 + x = 130 - 25 = 115
x = 115 - 100 = 15
Vậy x = 15
d)
175 + (30 - x) = 200
30 - x = 200 - 175 = 25
x = 30 - 25 = 5
Vậy x = 5
e)
(x + 12) + 22 = 92
x + 12 = 92 - 22 = 70
x = 70 - 12 = 58
Vậy x = 58
f)
95 - (x + 2) = 45
x + 2 = 95 - 45 = 50
x = 50 - 2 = 48
Vậy x = 48
tìm X
70-5(x-3)=45
12+(5+x)=20
130-(100+x)=25
175+(30-x)=200
5(x+12)+22=92
a) \(70-5\left(x-3\right)=45\)
\(5\left(x-3\right)=25\)
\(x-3=5\)
\(\Rightarrow x=8\)
b) \(12+\left(5+x\right)=20\)
\(5+x=8\)
\(\Rightarrow x=3\)
c) \(130-\left(100+x\right)=25\)
\(100+x=105\)
\(\Rightarrow x=5\)
d) \(175+\left(30-x\right)=200\)
\(30-x=25\)
\(\Rightarrow x=5\)
e) \(5\left(x+12\right)+22=92\)
\(5\left(x+12\right)=70\)
\(x+12=14\)
\(\Rightarrow x=2\)
a. 70 - 5.(x - 3) = 45
5.(x - 3) = 70 - 45
x - 3 = 25 : 5
x = 5 + 3
x = 8
b. 12 + (5 + x) = 20
5 + x = 20 - 12
x = 8 - 5
x = 3
c. 130 - (100 + x) = 25
100 + x = 130 - 25
x = 105 - 100
x = 5
d. 175 + (30 - x) = 200
30 - x = 200 - 175
x = 30 - 25
x = 5
e. 5.(x + 12) + 22 = 92
5.(x + 12) = 92 - 22
x + 12 = 70 : 5
x = 14 - 12
x = 2
a) 145- (125+x)=12
b) 5(x+12) +22=92
tik mk nha mk sẽ tik lại,làm câu kết luận luôn nha!!!!!!!!!thanks
a) 145 - ( 125 + X ) = 12
125 + X = 145 - 12
125 + X = 133
X = 133 - 125
X = 8
Vậy X = 8
b) 5.( X + 12 ) + 22 = 92
5.( X + 12 ) = 92 - 22
5.( X + 12 ) = 70
X + 12 = 70 : 5
X + 12 = 14
X = 14 - 12
X = 2
Vậy X = 2
Học tốt #
a) 145-(125+x)=12
125+x=145-12
125+x=133
x=133-125
x=8
Vậy x = 8
b) 5(x+12)+22=92
5(x+12)=92-22
5(x+12)=70
x+12=70:5
x+12=14
x=14-12
x=2
Vậy x = 2
mk nha mn
\(a) 145-(125+x)=12\)
\(=> 125+x=145-12\)
\(=> 125+x=133\)
=> \(x=133-125\)
=> \(x=8\).Vậy \(x=8\)
\(b) 5(x+12)+22=92\)
\(=> 5(x+12)=92-22 \)
\(=>5(x+12)=70\)
\(=> x+12=70.5\)
\(=>x+12=350\)
\(=> x=350-12\)
\(=> x=338\).Vậy \(x=338\)
tính nhanh
a) 70 - ( x - 3 ) = 45 ; b) 12 + ( 5 + x ) = 20 ; c) 130 - ( 100 + x ) = 25 ; d) 175 + ( 30 - x ) = 200 ; e) ( x + 12 ) + 22 = 92 ; f) 95 - ( x + 2 ) = 45
ai giải giúp mình với.
tìm x biết a, -12(x-5)+7(3-x)=5 b, 30(x+2)-6(x-5)-24x= 100. Mk đang cần gấp nha ai trả lời nhanh và đung 100% mk se tick
a.-12 ( x-5 ) +7 (3-x) = 5
-12x +60 + 21 - 7x =5
60+21-5 = 12x + 7x
76 = 19x
x = 4
b.30(x +2) - 6(x-5) -24x = 100
30x+60 - 6x -30-24x = 100
60-30-100 = 30x -6x - 24x
-70 = 0x
x = -70
Tìm STN x biết.
70 - 5. (X-3) = 45
12+ (5+x) = 20
130-( 100+x) = 25
175 + (30 - x) = 200
5(x + 12) + 22 = 92
95-5(x+2) = 45
14x +54 = 82
15x -133 = 17
155-10(x + 1) = 55
1) 70 - 5( x - 3 ) = 45
5( x - 3 ) = 70 - 45
5( x - 3 ) = 25
x - 3 = 25 : 5
x - 3 = 5
x = 5 + 3
x = 8
2) 12 + ( 5 + x ) = 20
5 + x = 20 - 12
5 + x = 8
x = 8 - 5
x = 3
3) 130 - ( 100 + x ) = 25
100 + x = 130 - 25
100 + x = 105
x = 105 - 100
x = 5
4) 175 + ( 30 - x ) = 200
30 - x = 200 - 175
30 - x = 25
x = 30 - 25
x = 5
5) 5( x + 12 ) + 22 = 92
5( x + 12 ) = 92 - 22
5( x + 12 ) = 70
x + 12 = 70 : 5
x + 12 = 14
x = 14 - 12
x = 2
6) 95 - 5( x + 2 ) = 45
5( x + 2 ) = 95 - 45
5( x + 2 ) = 50
x + 2 = 50 : 5
x + 2 = 10
x = 10 - 2
x = 8
7) 14x + 54 = 82
14x = 82 - 54
14x = 28
x = 28 : 14
x = 2
8) 15x - 133 = 17
15x = 17 + 133
15x = 150
x = 150 : 15
x = 10
9) 155 - 10( x + 1 ) = 55
10( x + 1 ) = 155 - 55
10( x + 1 ) = 100
x + 1 = 100 : 10
x + 1 = 10
x = 10 - 1
x = 9
14x + 54 = 82
175 + (30 - x) = 2001
1551- 10 (x + 1) = 55
5 . (x + 12) + 22 = 92
6 . (x + 23) + 40 = 100
14x + 54 = 82
14x = 28
x = 2
175 + (30 - x) = 2001
30 - x = 1826
x = 30 - 1826
x = - 1796
1551 - 10 ( x + 1 ) = 55
10(x + 1) = 1496
x + 1 = 149,6
x = 148,6
5 . (x + 12) + 22 = 92
5 . (x + 12) = 70
x + 12 = 14
x = 2
6 . (x + 23) + 40 = 100
6 . (x + 23) = 60
x + 23 = 10
x = - 13
\(14x+54=82\)
\(\Leftrightarrow14x=82-54\)
\(\Leftrightarrow14x=28\)
\(\Leftrightarrow x=2\)
Vậy \(x=2\)
\(175+\left(30-x\right)=2001\)
\(\Leftrightarrow30-x=2001-175\)
\(\Leftrightarrow30-x=1826\)
\(\Leftrightarrow x=-1796\)
Vậy \(x=-1796\)
\(1551-10\left(x+1\right)=55\)
\(\Leftrightarrow10.\left(x+1\right)=1551-55\)
\(\Leftrightarrow10.\left(x+1\right)=1496\)
\(\Leftrightarrow x+1=\frac{1496}{10}\)
\(\Leftrightarrow x=\frac{1486}{10}\)
Vậy \(x=\frac{1486}{10}\)
\(5.\left(x+12\right)+22=92\)
\(\Leftrightarrow5.\left(x+12\right)=70\)
\(\Leftrightarrow x+12=14\).
\(\Leftrightarrow x=2\)
Vậy \(x=2\)
\(6.\left(x+23\right)+40=100\)
\(\Leftrightarrow6.\left(x+23\right)=60\)
\(\Leftrightarrow x+23=10\)
\(\Leftrightarrow x=-13\)
Vậy \(x=-13\)
a)x-15=23+12
b)800:(x-12)=10
c)12.x+120=480
d)(-5).x3-600=25
e)2x+2+2x+1+4.2x=160
cảm ơn nhiều
a: =>x-15=20
hay x=35
c: =>12x=360
hay x=30
Giúp mk vs mk cần gấp nha .
Bài 3: Tính tổng các số nguyên x biết: 1/ -20 < x < 21
2/ -18 ≤ x ≤ 17
3/ -27 < x ≤ 27
4/ │x│≤ 3
5/ │-x│< 5
Bài 4: Tính tổng
1/ 1 + (-2) + 3 + (-4) + . . . + 19 + (-20)
2/ 1 – 2 + 3 – 4 + . . . + 99 – 100
3/ 2 – 4 + 6 – 8 + . . . + 48 – 50
4/ – 1 + 3 – 5 + 7 - . . . . + 97 – 99
5/ 1 + 2 – 3 – 4 + . . . . + 97 + 98 – 99 - 100
Bài 5: Tính giá trị của biểu thức
1/ x + 8 – x – 22 với x = 2010
2/ - x – a + 12 + a với x = - 98 ; a = 99
3/ a – m + 7 – 8 + m với a = 1 ; m = - 123
4/ m – 24 – x + 24 + x với x = 37 ; m = 72
5/ (-90) – (y + 10) + 100 với p = -24
Bài 6: Tìm x
1/ -16 + 23 + x = - 16
2/ 2x – 35 = 15
3/ 3x + 17 = 12
4/ │x - 1│= 0
5/ -13 .│x│ = -26
Bài 7: Tính hợp lí
1/ 35. 18 – 5. 7. 28
2/ 45 – 5. (12 + 9)
3/ 24. (16 – 5) – 16. (24 - 5)
4/ 29. (19 – 13) – 19. (29 – 13)
5/ 31. (-18) + 31. ( - 81) – 31
6/ (-12).47 + (-12). 52 + (-12)
7/ 13.(23 + 22) – 3.(17 + 28)
8/ -48 + 48. (-78) + 48.(-21)
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