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 - 6a = 9a - 3x - 9 for a in terms of x.
| -5\(\frac{1}{2}\)x - 2 | |
| 2x - 2\(\frac{1}{2}\) | |
| -\(\frac{3}{11}\)x + \(\frac{9}{11}\) | |
| -2\(\frac{3}{4}\)x - 1\(\frac{1}{2}\) |