SOLUTION: Can you please help me solve 3x-y=x+3? I don't understand howw to do equations with more than one variable. Could you please explain it to me?

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Question 11837: Can you please help me solve 3x-y=x+3?
I don't understand howw to do equations with more than one variable. Could you please explain it to me?
Answer by rapaljer(4551) About Me  (Show Source):
You can put this solution on YOUR website!
You could solve for one variable in terms of another, and the result in this case is a straight line graph. There are actually infinitely many points that satisfy this equation. In this case:
3x - y = x + 3
3x - 3x - y = x - 3x + 3
-y = -2x + 3

Divide both sides by -1:
y = 2x - 3

graph+%28300%2C300%2C+-10%2C10%2C-10%2C10%2C+2x-3%29

Usually if you want to "solve" equations in two variables, a second equation is given, and you solve the two equations with two variables by finding the point of intersection of the two lines, if there is a point of intersection.

R^2 at SCC

P.S. Due to technical problems during the night, I was not able to finish this problem last night. I had to finish it this morning. Sorry about that.