Question

Resolva:
x/5+x/2=3 ?

Answer 1

$\frac{x}{5} + \frac{x}{2} = 3$

mmc:
$\frac{2x}{10} + \frac{5x}{10} = \frac{30}{10}$

corta os denominadores de numero 10.
$2x + 5x = 30$
$7x=30$
$x = \frac{30}{7}$