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 -8a - 9a = -7a - 8x + 5 for a in terms of x.
| -x - 5 | |
| -\(\frac{3}{10}\)x + \(\frac{1}{2}\) | |
| -1\(\frac{1}{6}\)x + \(\frac{5}{6}\) | |
| -x - \(\frac{8}{9}\) |