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