Question 5473: i'm not quite sure how to solve this using substitution.
y=4x
x+y=5
I got(1/4,1) but i'm not quite sure if thats the right answer.
Also, does the system have exactly one solution, or more?
Thanks for helping me!
Answer by Abbey(339)   (Show Source):
You can put this solution on YOUR website! if y=4x, then substitute this into the second equation:
x+(y)=5
x+(4x)=5
5x=5
x=1
If x=1, then
y=4*1 or 4
the solution set is verified by testing these numbers in the other equation:
x+y=5
1+4=5 this is true so the answer has one solution:
(1,4)
The answer is put into parentheses, because we are talking about a point on a graph - where do these two lines cross? The answer is (1,4)
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