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 - a = -a - 2y - 7 for a in terms of y.
| -\(\frac{1}{3}\)y - 2\(\frac{1}{3}\) | |
| -3\(\frac{3}{4}\)y - 1\(\frac{1}{2}\) | |
| -1\(\frac{3}{8}\)y - \(\frac{5}{8}\) | |
| 5\(\frac{1}{2}\)y - 2 |