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jenni_fowler

  • 2 years ago

solve the system of equations y=2x-10 and x-y=7

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  1. sumanthy
    • 2 years ago
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    By substituion: put y=2x-10 in x-y=7 x-(2x-10)=7 x-2x+10=7 -x=7-10 -x=-3 x=3 Put x=3 in y=2x-10 y=2*3-10 y=-4

  2. sumanthy
    • 2 years ago
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    Graphically you can draw the lines and find the point of intersection.

  3. sumanthy
    • 2 years ago
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    There is one more method called Elimination :)

  4. shahzadjalbani
    • 2 years ago
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    y=2x-10 can be changed into 2x-y=10 now subtract equation 2 from 1 2x-y=10 x-y=7 ------------ x=3 put value of x in first equation you will get value of y.

  5. jenni_fowler
    • 2 years ago
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    oh

  6. sumanthy
    • 2 years ago
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    shahzadjalbani gave elimination method :)

  7. jenni_fowler
    • 2 years ago
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    ah i like that way better i think

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