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 2c + 7c = 8c - 8y + 9 for c in terms of y.
| 2\(\frac{1}{2}\)y - 1\(\frac{1}{2}\) | |
| 1\(\frac{2}{11}\)y - \(\frac{6}{11}\) | |
| \(\frac{1}{3}\)y + \(\frac{7}{12}\) | |
| 5y - 5 |