Question
Flynn has some red and white balls. The total mass of all his balls is 224 g. He has 7 more white balls than red balls. The average mass of the red balls is 4 g. The average mass of the white balls is 10 g. How many balls does Flynn have altogether?
3 m

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Flynn has some red and white balls. The total mass of all his balls is 224 g. He has 7 more white balls than red balls. The average mass of the red balls is 4 g. The average mass of the white balls is 10 g. How many balls does Flynn have altogether?