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March 28, 2017

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The perimeter of a triangle is 47 miles. The first side is 5 miles less than twice the second and the third is 2 miles more than the first. Find the lengths of each side.

  • algebra - ,

    if x is second side,
    first is 2x-5
    third is 2x-5+2 = 2x-3
    so,
    2x-5 + x + 2x-3 = 47
    5x = 55
    x = 11

    So, the 3 sides are 17,11,19

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