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 4a - 9a = -4a + 2y - 4 for a in terms of y.
| 2y - 6 | |
| y + 4 | |
| 1\(\frac{3}{8}\)y - \(\frac{1}{2}\) | |
| -1\(\frac{1}{2}\)y - \(\frac{3}{4}\) |