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 - 7c = -c - 9x + 2 for c in terms of x.
| x - 4 | |
| -2\(\frac{1}{2}\)x + 1 | |
| -\(\frac{10}{11}\)x - \(\frac{4}{11}\) | |
| -\(\frac{1}{4}\)x + \(\frac{1}{4}\) |