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 8a + 3a = 6a + 9z - 9 for a in terms of z.
| \(\frac{1}{3}\)z + \(\frac{1}{3}\) | |
| -1\(\frac{1}{12}\)z - \(\frac{1}{6}\) | |
| 3z - 4\(\frac{1}{2}\) | |
| -12z + 3 |