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