angeldavisloves angeldavisloves
  • 18-11-2014
  • Mathematics
Answered

2x+7y=1
X+5y=2 answer using elimination method



Answer :

luana
luana luana
  • 19-11-2014
[tex] \left \{ {{2x+7y=1} \atop {x+5y=2\ \ |*(-2)}} \right. \\\\ \left \{ {{2x+7y=1} \atop {-2x-10y=-4}} \right. \\+----\\elimination\ method\\\\ -3y=-3\ \ \ | divide\ by\ -3\\ y=1\\\\ x=2-5y=2-5=-3\\\\ solution:\\ \left \{ {{y=1} \atop {x=-3}} \right. [/tex]
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