Question

solve:
r + 8 + 4r = -12 (1 + 8r) -5 (-4 - 3r)
r =
semester 1 final review

Explanation:

Step1: Combine like terms on left

$r + 8 + 4r = 5r + 8$

Step2: Distribute on right

$-12(1 + 8r) - 5(-4 - 3r) = -12 - 96r + 20 + 15r$

Step3: Combine right terms

$-12 + 20 - 96r + 15r = 8 - 81r$

Step4: Set equal, solve for r

$5r + 8 = 8 - 81r$
$5r + 81r = 8 - 8$
$86r = 0$
$r = 0$

Answer:

$r = 0$