Question
Yesterday, Zane had 47 as many grey as blue balls. He sold 30 of his blue balls today. Now, he has twice as many grey as blue balls. How many balls did he have altogether yesterday?
4 m

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Yesterday, Zane had 47 as many grey as blue balls. He sold 30 of his blue balls today. Now, he has twice as many grey as blue balls. How many balls did he have altogether yesterday?