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 - 6c = 9c + 9y - 4 for c in terms of y.
| 5y - 4 | |
| -1\(\frac{1}{11}\)y + \(\frac{7}{11}\) | |
| -\(\frac{15}{16}\)y + \(\frac{1}{4}\) | |
| -3y + 8 |