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