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 - 9a = -5a - 8y + 4 for a in terms of y.
| 5\(\frac{1}{2}\)y - 3\(\frac{1}{2}\) | |
| y + 1 | |
| \(\frac{1}{14}\)y + \(\frac{2}{7}\) | |
| \(\frac{2}{5}\)y + \(\frac{1}{5}\) |