Step One: Plug in (x-1) for y in 2x-y = 0
[tex]2x-(x-1)=0[/tex]
Step Two: Distribute the negative
[tex]2x -x -(-1)=0 \\ 2x-x+1=0[/tex]
Step Three: Add like terms on one side of the equation
[tex]x + 1=0[/tex]
Step Four: Subtract 1 from both sides
[tex]x+1-1=0-1 \\ x = -1[/tex]
Step Five: Plug x into one original equation (I chose y=x-1 but you can do either one)
[tex]y=x-1 \\ y=-1-1 \\ y=-2[/tex]
That's the answer to the problem, x = -1, y = -2 (-1,-2)!
Hope this helps!
