Steps to solve:
-4(r + 3) = -42
~Distribute
(-4 * r) + (-4 * 3) = -42
~Simplify
-4r - 12 = -42
~Add 12 to both sides
-4r - 12 + 12 = -42 + 12
-4r = -30
~Divide -4 to both sides
-4r/-4 = -30/-4
r = 7.5
Best of Luck!
Answer:
7.5
Step-by-step explanation:
(-4) (7.5 + 3)= -42
