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