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Algebra

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A picture frame is 20cm x 16cm. There is 192cm squared of picture showing. Find the width of the frame.

  • Algebra -

    Hmmmm.

    Well if the width subtracts from the original dimensions,
    then

    (20-2w)(16-2w)=192

    solve for w.

  • Algebra -

    inside the perenthesis you have to subtract 2 from 20 you should get 18 and if you subtract 2 from 16 you should get 14.multiply 18x14 and you should get 192 and that's how you check your answer.

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