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 = 7a - y + 4 for a in terms of y.
| -5y + 2 | |
| \(\frac{4}{17}\)y + \(\frac{9}{17}\) | |
| -7y + 5 | |
| -6y - 5 |