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 - 8a = 4a - 8y + 4 for a in terms of y.
| -2\(\frac{1}{3}\)y + \(\frac{2}{3}\) | |
| -1\(\frac{1}{2}\)y - 2\(\frac{1}{2}\) | |
| -\(\frac{1}{2}\)y - \(\frac{4}{5}\) | |
| y - \(\frac{4}{13}\) |