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 -4a - a = -5a - 6x - 4 for a in terms of x.
| x + 8 | |
| -\(\frac{2}{5}\)x + \(\frac{9}{10}\) | |
| -5x - 4 | |
| -\(\frac{2}{5}\)x - \(\frac{1}{5}\) |