Answer
$r=9.75$
Work Step by Step
Given the equation:
$-4(r + 6) = -63$
We start by opening up the brackets as shown below:
$-4r - 24 = -63$
Isolate the variable $r$ by adding $24$ to both sides of the equation as shown below:
$-4r - 24 + 24 = -63 + 24$
Simplify to get:
$-4r = -39$
Divide through by the coefficient of the variable $r$ as shown below:
$\frac{-4}{-4}r = \frac{-39}{-4}$
$r = 9\frac{3}{4}$ which can also be written as $r = 9.75$
