Level 3
Adam buys 2 stickers and 3 marbles.
He finds that that he can buy 7 stickers with the same amount of money.
Each sticker costs 75¢.
How much is each marble?
Give the answer in dollars.
Level 3
Adam has 2 times as many red stickers as blue stickers.
He gives away 30 blue stickers.
Adam has 3 times as many red stickers as blue stickers.
How many more red stickers than blue stickers does Adam have at first?
How many less blue stickers than red stickers does Adam have in the end?