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Thread: Substitution

  1. October 7th 2008, 04:00 PM #1
    kaley015
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    Question Substitution

    Can you give me an example of substitution of an equation?
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  2. October 7th 2008, 04:11 PM #2
    skeeter
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    y = 2x+1
    3x + 2y = 16

    substitute (2x+1) for y in the second equation ...

    3x + 2(2x+1) = 16

    solve for x , then use the first equation to find y.
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