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