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 c - 9c = 5c - 6z + 6 for c in terms of z.
| 4z - 6 | |
| -z - 1\(\frac{4}{5}\) | |
| -\(\frac{3}{4}\)z - 1\(\frac{1}{2}\) | |
| -4z + 1 |