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