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