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 -5a - a = -8a + 2z - 8 for a in terms of z.
| -4z + 2\(\frac{2}{3}\) | |
| z - 2\(\frac{2}{3}\) | |
| -z - \(\frac{1}{3}\) | |
| 1\(\frac{3}{7}\)z - 1 |