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 + 3a = -8a + 3z + 9 for a in terms of z.
| -2z + 5 | |
| z - \(\frac{2}{5}\) | |
| z + 3 | |
| 15z - 1 |