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 - 7a = 9a + 8y - 4 for a in terms of y.
| 2\(\frac{1}{5}\)y - \(\frac{4}{5}\) | |
| -\(\frac{5}{6}\)y + \(\frac{2}{9}\) | |
| 3y + 9 | |
| 2\(\frac{4}{5}\)y - 1\(\frac{2}{5}\) |