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