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 + 5a = a + y - 1 for a in terms of y.
| -3\(\frac{1}{2}\)y + 3\(\frac{1}{2}\) | |
| 2y + 6 | |
| -1\(\frac{8}{9}\)y - \(\frac{1}{3}\) | |
| -\(\frac{1}{2}\)y - \(\frac{1}{8}\) |