Question
Yesterday, Ben had 910 as many yellow as white beads. He sold 21 of his white beads today. Now, he has thrice as many yellow as white beads. How many beads did he have altogether yesterday?
4 m

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Yesterday, Ben had 910 as many yellow as white beads. He sold 21 of his white beads today. Now, he has thrice as many yellow as white beads. How many beads did he have altogether yesterday?