Question

[3x + (2x - 20) ] / 3 = 45 Como resolver?

Answer 1

Resposta:

S = {31}

Explicação passo-a-passo:

$\frac{3x + (2x - 20)}{3} = 45 \\ \frac{3x + 2x - 20}{3} = 45 \\ \frac{5x - 20}{3} = 45 \\ 5x - 20 = 3.45 \\ 5x - 20 = 135 \\ 5x = 135 + 20 \\ 5x = 155 \\ x = \frac{155}{5} \\ x = 31$