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