Hey everyone, My son has this math riddle and it’s driving me crazy! Can someone please show me how this is done? Here it goes…

A seesaw can balance with more than one weight on each side as long as the sum of the products of the weights on one side and their distances from the fulcrum is equal to the sum of the products of the weights on the other side and their distances from the fulcrum. Can you determine how much the duck and rabbit on this seesaw weigh from the following clues?

The sum of the four weights is 40 pounds.

The owl weighs 3 pounds

The chicken weighs 5 pounds.

(And theres a picture…ill do my best)

duck…owl…chicken…rabbit

2…7…^…9…4

the numbers under my poorly shown scale above represent how far from the center of the scale the animal is (and the rabbit is 4 away from the chicken and the duck is 2 away from the owl…i guess…)

As you can see , I’m lost. Can anyone help me??