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