Carl has been selling watermelons on the side of the road for $3 each. This evening he went home with $105 in profit and 18 watermelons. How many watermelons did he start out with this morning?
Carl sells his watermelons for $3 each so today he sold $105 / $3 per watermelon = <T>divide(105, 3)=35.0 watermelons.
He had 18 watermelons left over, so this morning he started with 18 + 35 = <T>add(18, 35)=53 watermelons.
