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math 8th grade

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One of a pentagon's sides is 3 feet longer than the other. If the perimeter of the pentagon is 128m, how long is the longest side?

  • math 8th grade - ,

    I assume you mean "the others." A pentagon has 5 sides.

    4s + s + 3 = 128

    5s + 3 = 128

    Subtract 3 from both sides.

    5s = 125

    Divide both sides by 5.

    s = 25

    s + 3 = ?

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