Leslie weighs her marbles in a jar and the scale reads 474 gram the empty jar weighs 439 grams each marble weighs 5 grams how many marbles are in the jar
7 marbles. Subtract the weight of the marbles in the jar by the empty jar. 474-439=35. So just the marlbles together equal 35 grams. If each marble weighs 5 grams, divide 35 by 5= 7
