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anonymous

  • one year ago

I need help solving the x and y by eliminating these equations together 2x+y=11 6x-y=5

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  1. anonymous
    • one year ago
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    add them up in a column

  2. jim_thompson5910
    • one year ago
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    Add the equations up notice how the 2x and 6x combine to 8x the +y and -y add to 0y, that goes away the 11 and 5 add to 16

  3. anonymous
    • one year ago
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    the \(y\) terms add up to zero, leaving only the x terms \[8x=16\]

  4. jim_thompson5910
    • one year ago
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    so you'll end up with 8x = 16 which means x = ??

  5. anonymous
    • one year ago
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    So x is 2 right?

  6. anonymous
    • one year ago
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    yes

  7. anonymous
    • one year ago
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    Thanks!

  8. anonymous
    • one year ago
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    to find y replace x by 2 in either equation

  9. anonymous
    • one year ago
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    Ok thank you!

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spraguer (Moderator)
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