Question

calcule o valor desconhecido​

Answer 1

Resposta:

$\frac{x + 1}{18} = \frac{2}{6} \\ \\ 6.(x + 1) = 18 .2 \\ 6x + 6 = 36 \\ 6x = 36 - 6 \\ 6x = 30 \\ x = \frac{30}{6} \\ \\ x = 5$