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