Question

A) 4x + 8 = 7 + 5

B) 8 x = 40​

Answer 1

Explicação passo-a-passo:

$4x + 8 = 7 + 5 \\ 4x + 8 = 12 \\ (4x + 8) + ( - 8) = 12( - 8) \\ x = 1$

$8x = 40 \\ \frac{8x}{8} = \frac{40}{8} \\ x = 5$