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 - 2a = 9a + 7z + 4 for a in terms of z.
| -\(\frac{9}{14}\)z - \(\frac{2}{7}\) | |
| z + 9 | |
| -z - \(\frac{3}{7}\) | |
| 2z - 3 |