Question

`R - C=P`
Solve for C.

Answer 1

R-C=P
R-C(-R)=P(-R)
-C=P-R
-C/-1=P-R/-1
C=P+R

Answer 2

-c=p-r
If you were getting the negative C by itself you will want to move the R over on the opposite side. You do that by subtracting are to both sides the hours on the left cancel out leaving you with a negative C on the left side which equals P minus R on the right side