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 -c - 4c = -9c + x - 9 for c in terms of x.
| -3\(\frac{3}{4}\)x + 1\(\frac{1}{2}\) | |
| \(\frac{5}{8}\)x - 1\(\frac{1}{8}\) | |
| -x - \(\frac{1}{7}\) | |
| 1\(\frac{2}{5}\)x - 1 |