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 -2c - 5c = 8c - 7y - 9 for c in terms of y.
| \(\frac{1}{5}\)y + \(\frac{9}{10}\) | |
| -\(\frac{5}{7}\)y - \(\frac{4}{7}\) | |
| 1\(\frac{4}{7}\)y + \(\frac{1}{7}\) | |
| -\(\frac{2}{3}\)y + \(\frac{1}{2}\) |