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 2a - 9a = a - 9y - 8 for a in terms of y.
| -\(\frac{5}{8}\)y - 1 | |
| -1\(\frac{1}{2}\)y - \(\frac{1}{6}\) | |
| -\(\frac{2}{3}\)y - \(\frac{2}{3}\) | |
| y - 8 |