Put 1g on the left panel of the balance, 5g on the right panel, and then add an object to the left panel. The mass of the object that can balance the balance is 4g.

Put 1g on the left disk of the balance, put 10g on the right disk, and then add the object to the left disk. The mass of the object that can balance the balance is 9g.

Put 1g on the left panel of the balance, 5g and 10g on the right panel, and then add the object to the left panel, so that the object mass of the balance can be 14g.