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 + 4c = 2c - 3z - 6 for c in terms of z.
| 9z - 2 | |
| 1\(\frac{1}{8}\)z - \(\frac{3}{4}\) | |
| -\(\frac{2}{5}\)z - \(\frac{2}{5}\) | |
| -z - \(\frac{6}{7}\) |