SOLUTION: Solve each system by addition x-2y=-1 -x+5y=4

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Question 246062: Solve each system by addition
x-2y=-1
-x+5y=4
Answer by richwmiller(17219) About Me  (Show Source):
You can put this solution on YOUR website!
x-2y=-1
-x+5y=4
add the two equations
3y=3
y=1
substitute 1 for y in either equation
x-2(1)=-1
x-2=-1
add 2 to both sides
x=1
check
-1+5(1)=4
-1+5=4
4=4
ok