Question
Zoe has thrice as many stickers as Gem. After Gem has bought another 90 stickers, Gem has twice as many stickers as Zoe. How many stickers does Gem have at first?
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Zoe has thrice as many stickers as Gem. After Gem has bought another 90 stickers, Gem has twice as many stickers as Zoe. How many stickers does Gem have at first?