Question

1, x-2=-6

2, -5x-(-3)=13

3, 15-(x-7)=-21

4, 3x+17=2

5, 45-(x-9)=-35

Mk đag cần gấp . Cảm ơn nhiều

Answer 1

1. x = -4

2. x = -2

3. x = 43

4. x = -5

5. x = 89

Answer 2

1.

x-2=-6

x=-6+2

x=-4

2.

-5x-(-3)=13

-5x=13+(-3)

-5x=10

x=10:(-5)

x=-2

3.

15-(x-7)=-21

x-7=15-(-21)

x-7=36

x=7+36

x=43

4.

3x+17=2

3x=2-17

3x=-15

x=-15:3

x=-5

5.

45-(x-9)=-35

x-9=45-(-35)

x-9=80

x=80+9

x=89

học tốt nha

Answer 3

b, \(-5x-\left(-3\right)=13\)

\(\Rightarrow-5x+3=13\)

\(\Rightarrow-5x=10\)

\(\Rightarrow x=-2\)

c, \(15-\left(x-7\right)=-21\)

\(\Rightarrow x-7=15+21\)

\(\Rightarrow x-7=36\)

\(\Rightarrow x=43\)

e, \(45-\left(x-9\right)=-35\)

\(\Rightarrow x-9=45+35\)

\(\Rightarrow x-9=80\)

\(\Rightarrow x=89\)