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