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 - 3a = -a - 5y + 9 for a in terms of y.
| 1\(\frac{1}{7}\)y - \(\frac{2}{7}\) | |
| -\(\frac{1}{2}\)y + 2\(\frac{1}{4}\) | |
| -1\(\frac{1}{6}\)y - 1\(\frac{1}{3}\) | |
| \(\frac{1}{3}\)y - \(\frac{2}{3}\) |