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 -3a - a = -8a - 5y + 6 for a in terms of y.
| -8y + 7 | |
| -3\(\frac{1}{3}\)y - 2\(\frac{2}{3}\) | |
| 1\(\frac{3}{4}\)y - 1\(\frac{3}{4}\) | |
| -\(\frac{4}{5}\)y + 1\(\frac{1}{5}\) |