Question

como resolver: x/5+x/4=3

Answer 1

$\frac{x}{5} + \frac{x}{4} =3$

tirar o mmc de 5 e 4 = 20


$\frac{9x }{20} = \frac{60}{20}$

$9x = 60$

x= $\frac{20}{3}$