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 -3c - 6c = 3c + 9y - 2 for c in terms of y.
| -3y + 4 | |
| -\(\frac{2}{7}\)y + \(\frac{1}{7}\) | |
| -2\(\frac{1}{2}\)y + \(\frac{1}{3}\) | |
| -y - \(\frac{1}{2}\) |