Question

calcule mentalmente o valor de x

Answer 1

toda a resposta se encontra na foto

Answer 2

$a) \frac{x + 4}{6} = 1 \\ x + 4 = 1 \times 6 \\ x + 4 = 6 \\ x = 6 - 4 \\ x = 2$

B) $\frac{x - 5}{7} = 1 \\ x - 5 = 1 \times 7 \\ x - 5 = 7 \\ x = 7 + 5 \\ x = 12$