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 - 2c = 8c - y - 1 for c in terms of y.
| y - 5 | |
| -1\(\frac{1}{2}\)y + 2\(\frac{1}{2}\) | |
| -y + 1 | |
| \(\frac{1}{15}\)y - \(\frac{2}{15}\) |