SOLUTION: Solve the following systems of equation by substitution: 1. y=3x 2x+y=15

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Question 695365: Solve the following systems of equation by substitution:
1. y=3x
2x+y=15
Answer by solver91311(24713) About Me  (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.



Solve.





Now that you know , substitute back in to the first equation so you can calculate



John

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