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 -5a - 9a = 8a - 7x + 8 for a in terms of x.
| -\(\frac{4}{15}\)x - \(\frac{2}{15}\) | |
| -\(\frac{1}{6}\)x - \(\frac{2}{3}\) | |
| x - 2 | |
| -\(\frac{2}{13}\)x - \(\frac{8}{13}\) |