Question
Yesterday, Fred had 89 as many blue as black balls. He sold 42 of his black balls today. Now, he has four times as many blue as black balls. How many balls did he have altogether yesterday?
4 m

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Yesterday, Fred had 89 as many blue as black balls. He sold 42 of his black balls today. Now, he has four times as many blue as black balls. How many balls did he have altogether yesterday?