SOLUTION: Solve the following systems of equation by substitution:
1. y=3x
2x+y=15
Algebra.Com
Question 695365: Solve the following systems of equation by substitution:
1. y=3x
2x+y=15
Answer by solver91311(24713) (Show Source): You can put this solution on YOUR website!
Substitute 
for 
in the second equation because we know the two quantities are equal from the first equation.
\ =\ 15)
Solve.
Now that you know 
, substitute back in to the first equation so you can calculate
\ =\ 9)
John
Egw to Beta kai to Sigma
My calculator said it, I believe it, that settles it
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