Question
Layla and Olivia had 220 buttons altogether. After Layla gave 30 buttons to Olivia, Layla had 3 times as many buttons as Olivia. How many buttons did Olivia have at first?
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Layla and Olivia had 220 buttons altogether. After Layla gave 30 buttons to Olivia, Layla had 3 times as many buttons as Olivia. How many buttons did Olivia have at first?