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 6c + 9c = 7c + 6x + 7 for c in terms of x.
| -3x - 4 | |
| 3x - 7 | |
| -\(\frac{2}{5}\)x - \(\frac{3}{5}\) | |
| -\(\frac{1}{2}\)x - 1\(\frac{3}{4}\) |