Question
Henry has some red and yellow balls. The total mass of all his balls is 240 g. He has 5 less red balls than yellow balls. The average mass of the red balls is 8 g. The average mass of the yellow balls is 12 g. How many balls does Henry have altogether?
3 m

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Henry has some red and yellow balls. The total mass of all his balls is 240 g. He has 5 less red balls than yellow balls. The average mass of the red balls is 8 g. The average mass of the yellow balls is 12 g. How many balls does Henry have altogether?