Question

4) Resolvendo a equação: 4(x + 3) = 40 obtemos:

(A) x = 6
(B) x = 7
(C) x = 8
(D) x = 9​

Answer 1

Explicação passo-a-passo:

$4(x+3)=40\\\\x+3=\dfrac{40}{4} \\\\x+3=10\\\\x=10-3\\\\\boxed{\boxed{x=7}}$

Resposta B