Question

a) 3x + 2(x – 1) = –2
b) 3(x + 2) = 2x + 3
c) 5x – 3(x – 4) = x – 10
d) 2 – (2x – 3) = 1 + 5 (x – 1/5)

Com as soluções pfv, é urgente

Answer 1

Resposta:

Explicação passo-a-passo:

A) 3x + 2(x – 1) = –2

3x + 2x - 2 = - 2

5x = - 2 + 2

5x = 0

x = 0/5

x = 0

__________

b) 3(x + 2) = 2x + 3

3x + 6 = 2x + 3

3x - 2x = 3 - 6

x = - 3

___________

c) 5x – 3(x – 4) = x – 10

5x - 3x + 12 = x - 10

2x + 12 = x - 10

2x - x = - 10 - 12

x = - 22

___________

d) 2 – (2x – 3) = 1 + 5 (x – 1/5)

2 - 2x + 3 = 1 + 5x - 5/5

5 - 2x = 1 + 5x - 1

5 = 5x + 2x

5 = 7x

7x = 5

x = 5/7