The total mass of the objects on the left side of the seesaw is the same as the total mass of the objects on the right.
Every 
has equal mass and every 
has equal mass.
The mass of is 14 grams.
What is the mass of ?
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The total mass of the objects on the left side of the seesaw is the same as the total mass of the objects on the right.
Every has equal mass and every has equal mass.
The mass of is 14 grams.
What is the mass of ?