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 + 4a = 2a - y - 4 for a in terms of y.
| 5y + 4 | |
| \(\frac{2}{7}\)y - \(\frac{1}{14}\) | |
| -\(\frac{1}{2}\)y - \(\frac{2}{5}\) | |
| -5y + 6 |