x = 2

x-7 = -5

<=> x = -5+7

<=> x = 2

Vậy x =2

x=2

`x+4/5=45/5-36/35`

`x+4/5=279/35`

`x=251/34`

\(x+\left(13-15\right)=5+\left(10-7\right)\)

\(< =>x-2=8=>x=10\)

Ta có: \(x+\left(13-15\right)=5+10-7\)

\(\Leftrightarrow x-2=15-7=8\)

hay x=10

x + (13 - 15) = 5 + (10 - 7)

x + (13 - 15) = 5 + 3

x + (13 - 15) = 8

x + (-2) = 8

x = 8 - (-2)

x = 10

Chúc bạn học tốt!

Bài 1: 

a: x/-2=-18/x

=>x²=36

=>x=6 hoặc x=-6

b: x/2+x/5=17/10

=>7/10x=17/10

hay x=17/7

a, \(x + 1/6 = -3/8 \)

\(x = -3/8 - 1/6\)

\(x = -13/24\)

Vậy \(x = -13/24\)

b, \(-3/7 - x = 4/5 - 2/3\)

\(-3/7 - x = 2/15\)

\(x = -3/7 - 2/15\)

\(x = -59/105.\)

Vậy \(x = -59/105\)

x+1/6=-3/8

x=-3/8-1/6

x=-13/24

-3/7-x=4/5+-2/3
-3/7-x=2/15

x=-3/7-2/15

x=-59/105

tham khảo

x*3,4=15,3

x = 15,3 : 3,4

x = 4,5

7,5:x=0,24

x = 7,5 : 0,24

x = 31,25

5/6:x=7/8

x = 5/6 : 7/8

x = 20/21

2/3*x=5/9

x = 5/9 : 2/3

x = 5/6

Xx3,4=15,3

X       = 15,3 : 3,4

X       =4.5

7,5:x=0,24

      x=7,5 : 0,24

      x= 31.25

5/6:x=7/8

      x=5/6 : 7/8

      x=  20/21

2/3xX=5/9

       X= 5/9 : 2/3

       X= 5/6

X x 3,4 = 15,3

x = 15,3 : 3,4

x = 4,5

7,5 : x = 0,24

x = 7,5 : 0,24

x = 31,25

5/6 : x = 7/8

x = 5/6 : /8

x = 20/21

2/3 x X = 5/9

x = 5/9 : 2/3

x = 5/6

x : 7 = 108 => x = 108 x 7 = 756

= 756 nha

x x 7 = 357 => x = 357 : 7 = 51