Isolate the variable on one side.

$y=2x−5$
$+5+5$
$y+5=2x$

Solve for $x$.

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

Follow the steps in part (a).

Follow the steps in part (a).

$m=2n+5$

Follow the steps in part (a).

$y=−3x$