Question

3 (2x + 3) - 4 (x - 1) = 3
7(x - 1) -2(x - 5) = x - 5​

Answer 1

Resposta:

a)

$6x + 9 - 4x + 4 = 3 \\ 6x - 4x = - 9 - 4 + 3 \\ 2x = - 10 \\ x = \frac{ - 10}{2} \\ x = - 5$

b)

$7x - 7 - 2x + 10 = x - 5 \\ 7x - 2x - x = + 7 - 10 - 5 \\ 4x = - 8 \\ x = \frac{ - 8}{4} \\ x = - 2$