SOLUTION: how can i solve this equation by substitution: x+2y=7 y=3x

Algebra ->  Algebra  -> Coordinate Systems and Linear Equations  -> Lessons -> SOLUTION: how can i solve this equation by substitution: x+2y=7 y=3x      Log On

Ad: You enter your algebra equation or inequality - Algebrator solves it step-by-step while providing clear explanations. Free on-line demo .
Ad: Algebra Solved!™: algebra software solves algebra homework problems with step-by-step help!
Ad: Algebrator™ solves your algebra problems and provides step-by-step explanations!

   

Question 32047: how can i solve this equation by substitution:
x+2y=7
y=3x
Answer by mukhopadhyay(490) About Me  (Show Source):
You can put this solution on YOUR website!
y=3x
Substitute the value of y in the equation x+2y=7.
So, x+2(3x) = 7
=>7x=7
=>x=1
y=3x=>y=3
Answer: x=1 and y=3