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