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 7c + c = 2c - 9z + 9 for c in terms of z.
| 2z - 1 | |
| -10z - 4 | |
| z + 5 | |
| -2z + 1\(\frac{4}{5}\) |