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