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 - 3c = -9c - 4x + 9 for c in terms of x.
| 2x - 3 | |
| -\(\frac{5}{8}\)x - 1\(\frac{1}{8}\) | |
| -\(\frac{2}{5}\)x + 1\(\frac{3}{5}\) | |
| -\(\frac{1}{16}\)x + \(\frac{9}{16}\) |