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 + 9a = 7a + 8y + 2 for a in terms of y.
| \(\frac{1}{9}\)y - \(\frac{2}{9}\) | |
| \(\frac{9}{10}\)y + \(\frac{3}{10}\) | |
| -\(\frac{1}{5}\)y + \(\frac{1}{10}\) | |
| 13y - 7 |