What is r if - 4 (r+3) = - 42

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

~Simplify

-4r = - 30

~Divide - 4 to both sides

-4r/-4 = - 30/-4

~Simplify

r = 7.5

Best of Luck!

7.5

Step-by-step explanation:

(-4) (7.5 + 3) = - 42