SOLUTION: I'm having a hard time understanding the solving of the equation? Y=4-x Y=x-4 Getting tired

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Question 509630: I'm having a hard time understanding the solving of the equation?

Y=4-x
Y=x-4
Getting tired
Answer by mananth(16946) About Me  (Show Source):
You can put this solution on YOUR website!
Y=4-x
Y=x-4
since both are equal to Y
4-x=x-4
-2x=-8
/-2
x=4
Plug x=0 in any equation above
y=0