Giúp mik với
9. Tìm số nguyên x biết :
a) x - 5 = -1
b) x + 30 = -4
c) x - (-24) = 3
d) 22 - (-x) = 12
e) ( x + 5 ) + ( x - 9 ) = x + 2
f) ( 27 - x ) + ( 15 + x ) = x - 24
Ko sai đề nha!
tìm số nguyên x biết:
a)x - 5= -1
b)x +30= - 4
c)x -(-24)=3
d) 22 -( - x)=
e) ( x + 5) +(x - 9)= x+ 2
f) (27 - x) + (15 + x) = x - 24
a)\(x-5=-1\)
⇔\(x=4\)
b)\(x+30=-4\)
⇔\(x=-34\)
c)\(x-\left(-24\right)=3\)
⇔\(x+24=3\)
⇔\(x=-21\)
e)\(\left(x+5\right)+\left(x-9\right)=x+2\)
⇔\(x+5+x-9-x-2=0\)
⇔\(x-6=0\)
⇔\(x=6\)
f)\(\left(27-x\right)+\left(15+x\right)=x-24\)
⇔\(27-x+15+x-x+24=0\)
⇔\(66-x=0\)
⇔\(x=66\)
\(a.x-5=-1\) \(b.x+30=-4\)
\(x=\left(-1\right)+5\) \(x=\left(-4\right)-30\)
\(x=4\) \(x=-34\)
\(c.x-\left(-24\right)=3\) \(e.\left(x+5\right)+\left(x-9\right)=x+2\)
\(x=3+\left(-24\right)\) \(x+5+x-9=x+2\)
\(x=-21\) \(2x-4=x+2\)
\(2x-x=2+4\)
\(x=6\)
\(f.\left(27-x\right)+\left(15+x\right)=x-24\)
\(27-x+15+x=x-24\)
\(27+15=x-24\)
\(42=x-24\)
\(x=24+42\)
\(x=66\)
Bài 13 : Tìm số nguyên x biết :
a. x - 5 = - 1 c. x - ( - 24 ) = 3
b. x + 30 = 4 d. 22 - ( - x ) = 12
e. ( x + 5 ) + ( x - 9 ) = x + 2 f. ( 27 - x ) + ( 15 + x ) = x - 24
a)
\(x-5=-1\)
\(x=-1+5\)
\(x=4\)
b)
\(x+30=4\)
\(x=4-30\)
\(x=-26\)
c)
\(x-(-24)=3\)
\(x+24=3\)
\(x=3-24\)
\(x=-21\)
d)
\(22-(-x)=12\)
\(22+x=12\)
\(x=12-22\)
\(x=-10\)
e)
\(( x + 5 ) + ( x - 9 ) = x + 2\)
\(x+5+x-9=x+2\)
\(x+x-x=2+9-5\)
\(x=6\)
f)
\(( 27 - x ) + ( 15 + x ) = x - 24\)
\(27-x+15+x=x-24\)
\(-x+x-x=-24-15-27\)
\(-x=-66\)
\(x=66\)
x - 5 = -1 x - (-24) = 3
x = -1 + 5 x + 24 = 3
x = 4 x = 3 - 24
x + 30 = 4 x = - 21
x = 4 - 30 22 - ( -x) = 12
x = - 26 22 + x = 12
x + 5 + ( x - 9) = x + 2 x = 12 - 22
x + 5 + x - 9 = x + 2 x = -10
2x - x = 2 - 5 + 9 ( 27 - x) + ( 15 + x) = x - 24
x = - 3 + 9 27 - x + 15 + x = x - 24
x = 6 27 + 15 = x - 24
x - 24 = 42
x = 42 + 24
x = 66
Tìm số nguyên x biết:
a) x – 5 = - 1 ;
b) x + 30 = - 4;
c) x – ( - 24) = 3 ;
d) 22 – ( - x ) = 12;
e) ( x + 5 ) + ( x – 9 ) = x + 2 ;
f) ( 27 – x ) + ( 15 + x ) = x – 24 .
(27-X)+(15+x)=x-24
27-x+15+x=x-24
-x+x-x=-24-27-15
-x=-66
x=-(-66)
x=66
a) x – 5 = - 1 ;
=> x = -1 + 5 = 4
Vậy x = 4
b) x + 30 = - 4;
=> x = - 4 - 30 = - 34
Vậy x = - 34
c) x – ( - 24) = 3 ;
=> x + 24 = 3
=> x = 3 - 24
=> x = - 21
Vậy x = - 21
d) 22 – ( - x ) = 12;
=> 24 + x = 12
=> x = 12
Vậy x = 12
e) ( x + 5 ) + ( x – 9 ) = x + 2 ;
=> x + 5 +x - 9 = x + 2
=> 2x - x = 1 + 9 - 5
=> x = 5
Vậy x = 5
f) ( 27 – x ) + ( 15 + x ) = x – 24 .
=> 27 - x + 15 + x = x - 24
=> x + 42 = x - 24
=> x - x = 42 - 24
=> 0 = 8 ( vô lí)
Vậy x thuộc rỗng
Rảnh nhỉ
@@ Học tốt
## Chiyuki Fujito
a) \(x-5=-1\Rightarrow x=\left(-1\right)+5=4\)
b) \(x+30=-4\Leftrightarrow x=\left(-4\right)-30=-34\)
c) \(x-\left(-24\right)=3\Rightarrow x+24=3\Leftrightarrow x=3-24=-21\)
d) \(22-\left(-x\right)=12\Leftrightarrow22+x=12\Leftrightarrow x=12-22=-10\)
e) \(\left(x+5\right)+\left(x-9\right)=x+2\Leftrightarrow x+5+x-9=x+2\)
\(\Rightarrow x+x-x=2-5+9\Leftrightarrow x=6\) Vậy \(x=6\)
f) \(\left(27-x\right)+\left(15+x\right)=x-24\Leftrightarrow27-x+15+x=x-24\)
\(\Leftrightarrow27+15+24=x+x-x=x\Leftrightarrow x=66\) Vậy \(x=66\)
a) x - 10/3 = 7/15 . 3/5
b) x + 3/22 = 27/121 . 9/11
c) 8/23 . 46/24 - x = 1/3
d) 1 - x = 49/65 . 5/7
a: \(x-\dfrac{10}{3}=\dfrac{7}{15}\cdot\dfrac{3}{5}\)
=>\(x-\dfrac{10}{3}=\dfrac{21}{75}=\dfrac{7}{25}\)
=>\(x=\dfrac{7}{25}+\dfrac{10}{3}=\dfrac{21+250}{75}=\dfrac{271}{75}\)
b: \(x+\dfrac{3}{22}=\dfrac{27}{121}\cdot\dfrac{9}{11}\)
=>\(x+\dfrac{3}{22}=\dfrac{243}{1331}\)
=>\(x=\dfrac{243}{1331}-\dfrac{3}{22}=\dfrac{123}{2662}\)
c: \(\dfrac{8}{23}\cdot\dfrac{46}{24}-x=\dfrac{1}{3}\)
=>\(\dfrac{8}{24}\cdot\dfrac{46}{23}-x=\dfrac{1}{3}\)
=>\(\dfrac{2}{3}-x=\dfrac{1}{3}\)
=>\(x=\dfrac{2}{3}-\dfrac{1}{3}=\dfrac{1}{3}\)
d: \(1-x=\dfrac{49}{65}\cdot\dfrac{5}{7}\)
=>\(1-x=\dfrac{49}{7}\cdot\dfrac{5}{65}=\dfrac{7}{13}\)
=>\(x=1-\dfrac{7}{13}=\dfrac{6}{13}\)
Bài 5:Tìm các số nguyên x, biết:
a)( 2 x - 5 ) + 17 = 6
b)10 - 2 ( 4 - 3x ) = - 4
c)24 : ( 3 x - 2 ) = - 3
d)5 - 2 x = - 17 + 12
\(a,\left(2x-5\right)+17=6\\ \Rightarrow2x-5=-11\\ \Rightarrow2x=-6\\ \Rightarrow x=-3\\ b,10-2\left(4-3x\right)=-4\\ \Rightarrow2\left(4-3x\right)=14\\ \Rightarrow4-3x=7\\ \Rightarrow3x=-3\\ \Rightarrow x=-1\\ c,24:\left(3x-2\right)=-3\\ \Rightarrow3x-2=-8\\ \Rightarrow3x=-6\\ \Rightarrow x=-2\\ d,5-2x=-17+12\\ \Rightarrow5-2x=-5\\ \Rightarrow2x=10\\ \Rightarrow x=5\)
a: =>2x-5=-11
=>2x=-6
hay x=-3
b: =>2(4-3x)=14
=>4-3x=7
=>3x=-3
hay x=-1
c: =>3x-2=-8
=>3x=-6
hay x=-2
a) 2x-5+17=6
2x+12=6
2x=12-6
2x=6
x=6:2
x-3
b) 10-8+6x=-4
2+6x=-4
6x=-4-2
6x=-6
x=(-6):6
x=-1
c) 3x-2=24:(-3)
3x-2=-8
3x=-8+2
3x=-6
x=-6:3
x=-2
d) 5-2x=-5
-2x=-5-5
-2x=-10
x=-10:(-2)
x=5
bài 10,Tìm số nguyên x biết
a,x-5=-1
b,x+30=-4
c,x-(-24)=3
d,22-(-x)=12
e,(x+5)+(-9)=x+2
Sai thì sửa,chửa thì đẻ
a, Ta có :
Vậy
b, Ta có :
Vậy
c, Ta có :
Vậy
d,Ta có :
Vậy ....
e,Ta có :
Vậy x=6
tìm số nguyên x
( x+ 5)+(x-9)=x+2
( 27 -x) +( 15+x )=x-24
giúp tui nhanh với tui tck cho
a)( x+ 5)+(x-9)=x+2
x + 5 + x - 9 = x + 2
x + x - x = 2 -5 +9
x = 6
b)( 27 -x) +( 15+x )=x-24
-x + x - x = -24 -27 -15
-x = -66
x=66
hok tốt!
\(a.\left(x+5\right)+\left(x-9\right)=\)\(x+2\)
\(\Rightarrow x+x-x=2+9-5\)
\(\Rightarrow x=6\)
\(b.\left(27-x\right)+\left(15+x\right)=x-24\)
\(\Rightarrow x-x-x=-24-27-15\)
\(\Rightarrow-x=-66\)
\(\Rightarrow x=66\)
(x+5)+(x-9)=x+2
<=> x+5+x-9=x+2
<=> x+5+x-9-x-2=0
<=> x-6=0
<=> x=6
Vậy x=6
(27-x)+(15+x)=x-24
<=> 27-x+15+x=x-24
<=> 27-x+15+x-x+24=0
<=>66-x=0
<=> x=66
Vậy x=66
Giải
1.
a) 15-(4-x)=6 b) -30+(25-x)= -1
c) x-(12-25)=-8 c) (x-29)-(17-38)= -9
e)x-5=-1 f)x+30= -4
g) x-(-24)=3 h)22-(-x)=12
i) (x+5)+(x-9)=x+2 k) (27-x)+(15+x)=x-24
2.
a)461+(x-45)=387 b) -359+181+(-123)+350+(-172)
c)-(x+84)+213=-16 d) x-14=3x+18
e) 2(x-5) -3(x-4)=-6+15(-3) f) (x+7)(x-9)=0
g) |2x-5|-7=22 h) x(x+3)=0
i) (x-2)(5-x)=0 k) (x+1)(x2+1)=0
m)-12(x-5)+7(3-x)=5 n)30(x+2)-6(x-5)-24x=100
Mik biết bài này dài nhưng mong các bạn giúp mik với,mik đang cần gấp lắm!!!
1
a, 15 - ( 4 - x ) = 6
<=> 4 - x = 6 - 15
<=> 4 - x = -9
<=> x = -9 + 4
<=> x = -5
Mấy câu kia dễ tự làm :>
\(15-\left(4-x\right)=6\)
\(\Rightarrow4-x=9\)
\(\Rightarrow x=-5\)
\(x = gggggggggggggggggggggggggggggggggggggggggggggggggggg\)
Tìm số nguyên x biết :
a, ( x + 5 ) + ( x - 9 )= x + 2 b , ( 27 - x ) + (15 + x ) = x - 24
a, ( x + 5 ) + ( x - 9 )= x + 2
x + 5 + x - 9 = x + 2
x + x - x = 2 - 5 + 9
x = 6
Vậy x = 6
b , ( 27 - x ) + (15 + x ) = x - 24
27 - x + 15 + x = x - 24
- x + x - x = - 24 - 27 - 15
- x = -66
x = 66
Vậy x = 66
a, x+5+x-9 bằng x+2
2x - 4 bằng x+2
2x - x bằng 2+4
x bằng 6
b, 27-x+15+x bằng x-24
42 bằng x-24
x bằng 42+24
x bằng 66
mọi ng kết bạn vs mk ik
cùng nhau học tập nào
a, ( x + 5) + ( x - 9) = x + 2
<=> x + 5 + x - 9 = x + 2
<=> x + x - x = 2 - 5 + 9
<=> x = 6
Vậy_
b, ( 27 - x ) + ( 15 + x ) = x - 24
<=> 27 - x + 15 + x = x - 24
<=> -x + x - x = -24 - 27 - 15
<=> -x = -66
<=> x = 66
Vậy_