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25 April, 19:57

Matt is five years older than twice his cousin Andy's age. The sum of their ages is less than 35. Let x represent Andy's age.

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  1. 25 April, 20:50
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    Andy maximal age = 13.3

    Matt maximal age = 21.7

    I will translate the problem into 2 equation where X is Andy's age and Y is Matt's age.

    Y+5 = 2X

    Y = 2X-5

    X+Y<35

    From this equation, it is clear that you won't be able to find their age. But you can find maximal age of Andy and Matt by changing X+Y<35 into X+Y=35

    Inserting the first equation to the second equation you will get:

    X+Y=35

    X + (2X-5) = 35

    3X = 35+5=40

    X=13.3

    X+Y=35

    13.3+Y=35

    Y = 21.7
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