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 - 2a = -9a + 3z - 4 for a in terms of z.
| \(\frac{1}{2}\)z - \(\frac{1}{6}\) | |
| \(\frac{1}{2}\)z - 3\(\frac{1}{2}\) | |
| 1\(\frac{4}{9}\)z + \(\frac{1}{9}\) | |
| \(\frac{5}{18}\)z - \(\frac{2}{9}\) |