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 -2a - 6a = -a + 8z + 8 for a in terms of z.
| 7z + 8 | |
| -14z - 8 | |
| 1\(\frac{1}{3}\)z - 1\(\frac{1}{2}\) | |
| z - 1\(\frac{3}{4}\) |