What is r when 4 plus 5r equals -11?

Answer 1

First, translate it into an algebraic equation:
4 + 5r = -11

Then we subtract 4 from both sides:
4 + 5r - 4 = -11 - 4

Now we can simplify our numbers together:
(4 - 4) + 5r = -11 - 4
0 + 5r = -15
5r = -15

Now we divide both sides by 5:
(5r / 5) = (-15 / 5)
r = -3