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