SOLUTION: Solving Systems by Graphing and Substitution How would you solve this problem by using substitution? 3x - y = 4 3x - y = 0 It would be greatly appreciated eve

Algebra ->  Coordinate Systems and Linear Equations  -> Linear Equations and Systems Word Problems -> SOLUTION: Solving Systems by Graphing and Substitution How would you solve this problem by using substitution? 3x - y = 4 3x - y = 0 It would be greatly appreciated eve      Log On


   

Question 245344:
Solving Systems by Graphing and Substitution
How would you solve this problem by using substitution?
3x - y = 4

3x - y = 0


It would be greatly appreciated ever so much.Thanks...
Answer by Alan3354(69443) About Me  (Show Source):
You can put this solution on YOUR website!
That can't be solved.
It says 3x-y is 4, and is 0.
That's inconsistent.
If you graph it, you get parallel lines, no intersection, no solution.
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Substitution:
3x - y = 4
3x - y = 0 --> y = 3x
Sub for y into 1st eqn:
3x - 3x = 4
0 = 4
It doesn't.