Question

Como resolver?$\frac{1}{3}* x=8+7?$

Answer 1

Temos que, $\dfrac{x}{3}=8+7$.

Assim, $x=3(8+7)=3\times15=45$.

Verificando, temos:

$\dfrac{45}{3}=8+7$

$15=8+7$

$15=15$

$S=\{45, \}$