anonymous
  • anonymous
I need help solving the x and y by eliminating these equations together 2x+y=11 6x-y=5
Mathematics
chestercat
  • chestercat
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anonymous
  • anonymous
add them up in a column
jim_thompson5910
  • jim_thompson5910
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
anonymous
  • anonymous
the \(y\) terms add up to zero, leaving only the x terms \[8x=16\]

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jim_thompson5910
  • jim_thompson5910
so you'll end up with 8x = 16 which means x = ??
anonymous
  • anonymous
So x is 2 right?
anonymous
  • anonymous
yes
anonymous
  • anonymous
Thanks!
anonymous
  • anonymous
to find y replace x by 2 in either equation
anonymous
  • anonymous
Ok thank you!

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