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 - 8c = -5c - 9y - 7 for c in terms of y.
| -2\(\frac{1}{2}\)y + 4\(\frac{1}{2}\) | |
| -\(\frac{1}{2}\)y - 3\(\frac{1}{2}\) | |
| 8y + 2 | |
| y - \(\frac{1}{9}\) |