Mathematics, 09.12.2020 19:50 rapryce

Rolando, Anna, and Erika were collecting trivia cards. Rolando had 210 cards. Anna had twice as many cards as Rolando, and Erika had as many cards as Rolando and
Anna together. How many trivia cards did the three friends have altogether?

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Rolando, Anna, and Erika were collecting trivia cards. Rolando had 210 cards. Anna had twice as man...

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