SOLUTION: solve the system 3x+4y=40 x-2y=0

Question 56376: solve the system
3x+4y=40
x-2y=0
Answer by scoop(27) (Show Source): You can put this solution on YOUR website!
3x+4y=40
x-2y=0
I would use the elimination method and get rid of the y variable:
3x+4y=40
(2)x-2y=0 leaving you with 2x-4y=0
then you simply add equations
3x+4y=40
2x-4y=0
5x=40 divide both sides by 5
x=8
to check...substitute 8 in expression for x
3(8)+4y=40
24+4y=40
4y=40-24
4y=16
y=4
24+16=40
8-8=0
you are correct!!!
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