SOLUTION: soving systems by substitution? 1. y=x+3 y=2x+4

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Question 209220: soving systems by substitution?
1. y=x+3
y=2x+4
Answer by checkley77(12569) About Me  (Show Source):
You can put this solution on YOUR website!
y=x+3
y=2x+4
x+3=2x=4
x-2x=4-3
-x=1
x=-1 ans.
y=-1=3
y=2 ans.
Proof:
2=2*-1+4
2=-2+4
2=2