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Math Help - linear equation.

  1. #1
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    linear equation.

    If a+4b+9c+16d=1

    4a+9b+16c+25d=12

    9a+16b+25c+36d=123

    Then find 16a+25b+36c+49d =
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  2. #2
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    Quote Originally Posted by jacks View Post
    If a+4b+9c+16d=1

    4a+9b+16c+25d=12

    9a+16b+25c+36d=123

    Then find 16a+25b+36c+49d =
    3\left(9a+16b+25c+36d\right)-3\left(4a+9b+16c+25d\right)+\left(a+4b+9c+16d\righ  t)=\;\;?
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  3. #3
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    Of course, you understand that when we say "Thank You", we really mean "Blast, Archie Mead got there before me!"
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