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 - a = -3a + 9y + 7 for a in terms of y.
| -\(\frac{3}{10}\)y + \(\frac{9}{10}\) | |
| -3y + \(\frac{1}{2}\) | |
| y - 1\(\frac{1}{2}\) | |
| \(\frac{5}{6}\)y + \(\frac{7}{12}\) |