Question
Hazel had 30 more coins than Zoe at first. Zoe gave 20 of her coins to Hazel. Hazel now has 3 times as many coins as Zoe. How many coins did Zoe have at first?
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Hazel had 30 more coins than Zoe at first. Zoe gave 20 of her coins to Hazel. Hazel now has 3 times as many coins as Zoe. How many coins did Zoe have at first?