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algebra

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The length of a rectangular field is 7 meters more than twice its width. If the perimeter is 140 meters, find the dimensions of the field.

  • algebra -

    31.5 and 38.5

  • algebra -

    Oh wait, I read it wrong, sorry.

  • algebra -

    width --- x
    length -- x+7

    2(x + x+7) = 140

    easy to solve...

  • algebra -

    and I read it wrong as well, lol

    width --- x
    length -- 2x+7

    2(x + 2x+7) = 140

    easy to solve...

  • algebra -

    P=2(l+w)
    width=w
    length=2w+7
    (w)+(w)+(2w+7)+(2w+7)=140
    6w+14=140
    6w=140-14
    6w=126
    w=126/6
    w=21(width)
    l=2w+7
    2*21=42+7=49 (length)

  • algebra -

    I am 100% sure that my answer is right!!
    By the way,in what grade is the person who asked this question (just wondering...)

  • algebra -

    width= x
    lengtth=x+2
    so
    x(x+2)=170
    easy to solve....................

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