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