SOLUTION: Can you please help solve the systems of equations by substitution? 5x+y=8 y=3x

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Question 528167: Can you please help solve the systems of equations by substitution?
5x+y=8
y=3x
Answer by Alan3354(69443) About Me  (Show Source):
You can put this solution on YOUR website!
5x+y=8
y=3x
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Sub for y in the 1st eqn
5x + 3x = 8
Go from there.