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 -8c - 4c = 5c + 2x + 4 for c in terms of x.
| 12x + 8 | |
| -\(\frac{6}{13}\)x - \(\frac{4}{13}\) | |
| -\(\frac{1}{2}\)x - 1\(\frac{1}{2}\) | |
| x - 1 |