Question

What’s the answer ?

Answer 1

$3m + xy = \dfrac{xp}{4}$

Cross multiply:
$4( 3m + xy) = xp$

Distribute 4:
$12m + 4xy = xp$

Take away 4xy from both sides:
$xp - 4xy = 12m$

Take x as the common factor:
$x(p - 4y) = 12m$

Divide both sides by p - 4y :
$x = \dfrac{12m}{p - 4y}$