Question

Solve for substitution of Y=x-1 and 2x-y=0

Answer 1

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

Answer 2

Step One: Plug in (x-1) for y in 2x-y = 0

Step Two: Distribute the negative
<u />
Step Three: Add like terms on one side of the equation

Step Four: Subtract 1 from both sides

Step Five: Plug x into one original equation (I chose y=x-1 but you can do either one)

That's the answer to the problem, x = -1, y = -2 (-1,-2)!
Hope this helps!