# SOLUTION: I need help please with this graphing problem by solving each system by addition x-2y=-1 -x+5y=9

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 Click here to see ALL problems on Graphs Question 178966: I need help please with this graphing problem by solving each system by addition x-2y=-1 -x+5y=9Answer by Mathtut(3670)   (Show Source): You can put this solution on YOUR website!x-2y=-1.....eq 1 -x+5y=9.....eq 2 : what you doing here is adding all the terms from eq1 to all the terms in eq 2 : we can only put together like terms so x-x=0...so the x term is eliminated : -2y+5y=3y -1+9=8 : so we are left with 3y=8 : 3y=8 : divided by 3 to isolate the variable y : now take y's found value and plug it back into either numbered equation I choose eq 1 : x-2(8/3)=-1 : x-16/3=-1 : 3x-16=-3.....multiplied all terms by 3 : 3x=13 :