Question

1/3x+1/4x-2= 5 con comprobación plis

Answer 1

Despejamos x

$\frac{1}{3} x + \frac{1}{4}x = 5+2$
$\frac{7}{12} x = 7$
x = 7 ÷ $\frac{7}{12}$
x = 12

Saludos!