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