Question

solve for r.
$10 = 1 + 3r$
$r = \square$

Explanation:

Step1: Subtract 1 from both sides

$10 - 1 = 1 + 3r - 1$
$9 = 3r$

Step2: Divide both sides by 3

$\frac{9}{3} = \frac{3r}{3}$
$3 = r$

Answer:

$3$