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 -4a - a = a + 8z - 9 for a in terms of z.
| -\(\frac{1}{8}\)z - \(\frac{1}{4}\) | |
| 3z - 7 | |
| -1\(\frac{4}{5}\)z + 1\(\frac{4}{5}\) | |
| -\(\frac{9}{10}\)z - \(\frac{4}{5}\) |