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 -9a - 8a = 2a - 4z + 2 for a in terms of z.
| -z + 7 | |
| -\(\frac{4}{11}\)z - \(\frac{2}{11}\) | |
| -z + 2 | |
| -1\(\frac{3}{5}\)z + \(\frac{4}{5}\) |