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 + 9a = -6a - 3z + 2 for a in terms of z.
| -4z + 8 | |
| \(\frac{4}{5}\)z - 1\(\frac{2}{5}\) | |
| \(\frac{1}{8}\)z - \(\frac{5}{8}\) | |
| 12z - 2 |