So each side is even so you know that c = 12. Then you can see there are 4 c’s. So you multiply 4 X ? = 12 or 4/12 = ?. So the answer is 3. For each hanger balance, 4 hangers, and 12 weight on each side. So the equation is 12 divided by 4 = 3 or 12 divided by 4 = ?.
