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 3a + 9a = 2a + 9y - 2 for a in terms of y.
| 1\(\frac{1}{10}\)y + \(\frac{1}{10}\) | |
| y - 2 | |
| -1\(\frac{3}{5}\)y - \(\frac{3}{5}\) | |
| -\(\frac{1}{4}\)y - \(\frac{7}{8}\) |