Question

2-↓↓↓

A) -40 = -10x

B) 3x = -45 - 2x

C) 6(x + 3) - 2(x - 5) = 20

D) -18 = 2x + 15

E)2(x - 1) - 1 = 8

F) 2(x - 7) - 4(5 - x) = 2​

Answer 1

Explicação passo-a-passo:

A)

-40 = -10x

10x = 40

x= 40/10

x= 4

B)

3x = -45 - 2x

3x + 2x = 45

5x = 45

x=45/5

x= 9

C)

6(x + 3) - 2(x - 5) = 20

6x + 18 - 2x + 10 = 20

6x -2x + 18 + 10 = 20

4x + 28 = 20

4x =20 - 28

4x = - 8

x= - 8/4

x= -2

D)

-18 = 2x + 15

-2x = 15 + 18

-2x = 33 .(-1)

2x = - 33

x= - 33/2

E)

2(x - 1) - 1 = 8

2x - 2 - 1 = 8

2x - 3 = 8

2x = 8 + 3

2x= 11

x= 11/2

F)

2(x - 7) - 4(5 - x) = 2

2x - 14 - 20 + 4x = 2

2x + 4x - 34 = 2

2x = 2 + 34

2x = 36

x= 36/2

x= 18