When solving an equation with two variables, replace the variables with the values given and then solve the now variable-free equation. (Remember order of operations, PEMDAS, Parentheses, Exponents, Multiplication/Division, Addition/Subtraction.)
Solve 9c + 9c = -5c + 9z + 7 for c in terms of z.
| 3z + 5 | |
| \(\frac{3}{5}\)z - \(\frac{1}{5}\) | |
| z + \(\frac{1}{2}\) | |
| 13z + 1 |