SOLUTION: what's 4x+3y=10 y=2x in sustitution method?? plz answer asap!!1 thnxx

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Question 569457: what's
4x+3y=10
y=2x
in sustitution method??
plz answer asap!!1
thnxx
Answer by josmiceli(19441) About Me  (Show Source):
You can put this solution on YOUR website!
(1) +4x%2B3y=10+
(2) +y=2x+
Substitute (2) into (1)
(1) +4x+%2B+3%2A%282x%29+=+10+
(1) +4x+%2B+6x+=+10+
(1) +10x+=+10+
(1) +x+=+1+
and, since
(2) +y+=+2x+
(2) +y+=+2%2A1+
(2) +y+=+2+
So, the solution is ( 1,2 )
Here's a plot of the lines
+graph%28+400%2C+400%2C+-6%2C+6%2C+-6%2C+6%2C+2x%2C+-%284%2F3%29%2Ax+%2B+10%2F3+%29+