Math

The perimeter of a triangle is 19 cm. If the length of the longest side is twice that of the shortest side and 3 cm less than the sum of the lengths of the other two sides, find the lengths of the three sides

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  1. If the shortest side is x and the middle length is y, then

    x + y + 2x = 19

    But 2x is also x+y-3, so y=x+3, and

    x + x+3 + 2x = 19
    x = 4

    and the sides are 4,7,8

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