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 -a - 9a = -4a + y + 9 for a in terms of y.
| \(\frac{1}{3}\)y - \(\frac{2}{5}\) | |
| 3\(\frac{1}{3}\)y + 3 | |
| -11y + 2 | |
| y - \(\frac{7}{8}\) |