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 -9a - 7a = -4a + 8z - 9 for a in terms of z.
| -\(\frac{2}{13}\)z + \(\frac{2}{13}\) | |
| -3z + 1\(\frac{4}{5}\) | |
| -z - \(\frac{2}{7}\) | |
| 15z - 7 |