Y equals 2x-4andx-y equals 1

Answer 1

1) Y=2x-4

2) x-Y=1

Since you already have Y alone in the first equation, plug the first equation into the second equation. This will give you:

2) x-(2x-4)=1

Now solve for X. To do this, first change the signs of (2x-4) since it is being subtracted. This gives you:

2) x-2x+4=1

Subtract 4 from both sides, giving you:

2) x-2x=-3

Combine like terms, giving you:

2) -x=-3

Of course, from this we can see that x=3.

Now plug x=3 into equation 1) Y=2x-4 which gives you:

1) Y=2(3)-4

Solve for Y. Y=2

X=3 Y=2