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Patreiciacoron Patreiciacoron
  • 28-10-2015
  • Mathematics
Answered

-5x+4y=20

10x-8y=-40

Verified Answer :

Anonymous Anonymous
  • 28-10-2015

-5x+4y=20    (2)
10x-8y=-40
=============
-10x+8y=40
10x-8y=-40
-------------------------- ( - )
-20x == => x=0
-5*0+4y=20 => 0+4y=20 => 4y=20 => y=5 

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