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