Mathematics, 16.10.2020 20:01, texdee43

Luis and Roberto are donating some of their baseball cards to the library. Luis started with 50 cards and gave away X number of them. Roberto started with 80 cards and gave away 3 times as many as Luis had given away. If they both now have the same number of baseball cards, how many baseball cards did Roberto give away? A - 15
B - 35
C - 45
D - 65

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