Mathematics, 26.12.2020 01:00, jmitial

Esther had five times as many cards as Richard. Esther gave 1/4 of her cards to Richard. Then, Richard gave 1/6 of his cards to Esther in return. In the end, Esther had 90 more than Richard. How many cards did Esther have at first?

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Esther had five times as many cards as Richard. Esther gave 1/4 of her cards to Richard. Then, Richa...