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 8a + a = -5a - 9z + 1 for a in terms of z.
| \(\frac{1}{10}\)z + \(\frac{2}{5}\) | |
| -\(\frac{1}{2}\)z - \(\frac{1}{6}\) | |
| -\(\frac{10}{13}\)z + \(\frac{1}{13}\) | |
| 1\(\frac{1}{4}\)z + 1 |