Question
Julian has some yellow and red balls. The total mass of all his balls is 218 g. He has 2 more red balls than yellow balls. The average mass of the yellow balls is 5 g. The average mass of the red balls is 7 g. How many balls does Julian have altogether?
3 m

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Julian has some yellow and red balls. The total mass of all his balls is 218 g. He has 2 more red balls than yellow balls. The average mass of the yellow balls is 5 g. The average mass of the red balls is 7 g. How many balls does Julian have altogether?