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 + 2c = 9c - x - 9 for c in terms of x.
| x - 1 | |
| -7x + 6 | |
| \(\frac{3}{8}\)x + 1\(\frac{1}{8}\) | |
| x - \(\frac{1}{2}\) |