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 2a - 7a = a - 4z - 9 for a in terms of z.
| 14z - 4 | |
| 3z - 9 | |
| z - \(\frac{1}{10}\) | |
| -\(\frac{2}{9}\)z + \(\frac{1}{9}\) |