Question

Solve the following equations by systematic method.
$3x-5=7$

Answer 1

$3x-5=7$ (by adding $5$ on both sides)

$5-5+3x=7+5$

$3x=12$ (by diving both sides by $3$)

$\frac{3x}{3}=\frac{12}{3}$

$x=4$.