Mathematics, 21.06.2019 19:30, jaueuxsn

Liz had 140 pens and inna had 100 pens. after inna gave liz some pens, liz had 3 times as many pens as inna. how many pens did inna give liz?

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Liz had 140 pens and inna had 100 pens. after inna gave liz some pens, liz had 3 times as many pens...