Question

alguém sabe resolver

Answer 1

$\frac{15}{20}= \frac{x}{28}$
$\frac{3}{4} = \frac{x}{28}$
4x = 28 . 3
4x = 84
x = $\frac{84}{4}=21$

$\frac{20}{25}= \frac{28}{y}$
$\frac{4}{5} = \frac{28}{y}$
4y = 28 . 5
4y = 140
y = $\frac{140}{4}=35$