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 4a - a = -6a - 7z + 9 for a in terms of z.
| -\(\frac{1}{3}\)z - \(\frac{1}{2}\) | |
| -\(\frac{3}{5}\)z + \(\frac{9}{10}\) | |
| -4z - \(\frac{2}{3}\) | |
| \(\frac{1}{3}\)z - \(\frac{1}{9}\) |