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 a - a = 5a - 7z + 9 for a in terms of z.
| -\(\frac{1}{2}\)z + \(\frac{3}{4}\) | |
| -\(\frac{3}{13}\)z - \(\frac{6}{13}\) | |
| 1\(\frac{1}{2}\)z - 2\(\frac{1}{4}\) | |
| -2z + 1 |