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 = 3a - 8y + 7 for a in terms of y.
| -\(\frac{1}{5}\)y + \(\frac{7}{10}\) | |
| -\(\frac{1}{5}\)y - 1\(\frac{2}{5}\) | |
| y - \(\frac{1}{6}\) | |
| 17y - 9 |