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 - 8a = 6a - 4x + 9 for a in terms of x.
| -3\(\frac{1}{5}\)x - \(\frac{2}{5}\) | |
| -\(\frac{4}{9}\)x - 1 | |
| \(\frac{9}{14}\)x - \(\frac{2}{7}\) | |
| \(\frac{1}{2}\)x - \(\frac{1}{2}\) |