Hello There!
Since you are solving for C you would need to keep the variable c on one side to be able to determine the answer.
Start of by writing the equation.
3p +7c = p
As explained above move the numbers on the other side.
-3p + p = 7c
7c = -2p
Divide 7 in both sides to isolate the C.
Thus, the answer is [tex]c = \frac{-2p}{7}[/tex]
