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 3a + 5a = 9a - 9z - 7 for a in terms of z.
| \(\frac{1}{2}\)z - \(\frac{3}{5}\) | |
| -\(\frac{1}{8}\)z - 1\(\frac{1}{8}\) | |
| -\(\frac{1}{2}\)z + \(\frac{3}{10}\) | |
| 2\(\frac{1}{3}\)z + 1\(\frac{1}{6}\) |