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Mathematics, 26.01.2020 02:31 jalaholmes2027

John is twice as old as mary. the sum of their ages is 52. how old is mary? if j = john's age and m = mary's age, which system of equations could be used to solve the problem?

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John is twice as old as mary. the sum of their ages is 52. how old is mary? if j = john's age and m...
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