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 -9a - a = 8a + 9z + 2 for a in terms of z.
| -1\(\frac{3}{4}\)z - 2\(\frac{1}{4}\) | |
| -\(\frac{10}{17}\)z - \(\frac{2}{17}\) | |
| z + \(\frac{6}{13}\) | |
| -2\(\frac{1}{2}\)z + 2\(\frac{1}{4}\) |