You can put this solution on YOUR website! line up the equations
x-2y=-1
-x+5y= 4
the x variable cancels out and your left with
-2y=-1
5y=4
then you subtract the to y variables and the to whole numbers and get
3y=3
then you divide by 3 on both sides and get
y=1
then you plug in 1 for the top equation
x-2(1)=-1
x-2=-1
add 2 on both sides and get the value of x
x=1
Your answer is x=1 and y=1
PS you can plug in the two values into either equation and check your answer