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