Question
Betty and Gem had an equal number of buttons at first. Betty used 12 of her buttons and Gem used 17 of her buttons. They used 72 buttons altogether. How many buttons did Gem have in the end?
4 m

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Betty and Gem had an equal number of buttons at first. Betty used 12 of her buttons and Gem used 17 of her buttons. They used 72 buttons altogether. How many buttons did Gem have in the end?