solve for r
what is r equal to

The answer is: R = P + C

Steps:

First, move r to the left side of the equation and change its sign.

-r + p = - c

Then, move p to the right side and change its sign.

-r = -c - p

Multiply both sides of the equation by -1. This will change the variables back to positives, because any expression multiplied by -1 equals its opposite.

-1(-r) = -1(-c) -1(-p) =
r = c + p (don’t forget to change the sign)

So, your final solution is: r = c + p or r = p + c