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