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 4a + 8a = 3a - 6y - 9 for a in terms of y.
| 1\(\frac{5}{8}\)y - \(\frac{3}{4}\) | |
| 4y - 4 | |
| -1\(\frac{1}{2}\)y + 3\(\frac{1}{2}\) | |
| -14y - 9 |