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 6a + 5a = 5a - 7y - 9 for a in terms of y.
| -2y - 7 | |
| -\(\frac{5}{18}\)y + \(\frac{7}{18}\) | |
| -\(\frac{5}{6}\)y + \(\frac{3}{4}\) | |
| -12y - 9 |