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 - 5a = a - 8y + 9 for a in terms of y.
| 3y + 6 | |
| -\(\frac{2}{3}\)y - \(\frac{1}{9}\) | |
| -\(\frac{1}{2}\)y + 1\(\frac{1}{2}\) | |
| -y - \(\frac{9}{11}\) |