Question

A) a + 15 = 15 + 17
B) (6 + 8) + 10 = 6 (x + 10)

Answer 1

Resposta:

$a + 15 = 15 + 17 \\ a = 15 + 17 - 15 \\ a = 17 \\ b) (6 + 8) + 10 = 6(x + 10) \\ 14 + 10 = 6x + 60 \\ 24 = 6x + 60 \\ 6x = 24 - 60 \\ 6x = - 36 \\ x = - \frac{ 36}{6} \\ x = - 6$