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 = 4a + 2z + 7 for a in terms of z.
| -9z + 7 | |
| -z - 9 | |
| -\(\frac{3}{8}\)z - \(\frac{7}{8}\) | |
| -z - \(\frac{1}{6}\) |