Question

please help me and explain. what is the value of title=" \frac{x}{y} " alt=" \frac{x}{y} " align="absmiddle" class="latex-formula"> if $\frac{28}{ x^{2} } = \frac{7}{xy}$

Answer 1

$\frac{28}{x^2} = \frac{7}{xy}$
multiplying both sides by x^2
$28=\frac{7x^2}{xy}$
simplifying
$28= \frac{7x}{y}$
dividing by 7
$\frac{28}{7}= \frac{x}{y}$