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 9a + 2a = -a - x - 4 for a in terms of x.
| -1\(\frac{8}{9}\)x - \(\frac{5}{9}\) | |
| -\(\frac{3}{10}\)x - \(\frac{2}{5}\) | |
| 2\(\frac{2}{3}\)x - \(\frac{2}{3}\) | |
| x - 1\(\frac{1}{2}\) |