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