SOLUTION: How do i do this problem using elimination? 3x+y=11, 4x-y=7

Question 838570: How do i do this problem using elimination? 3x+y=11, 4x-y=7
Answer by brysca(112) (Show Source): You can put this solution on YOUR website!
So by using elimination you're setting the two equations vertically like this.
3x+y=11
4x-y=7
And all you're doing is just adding the two equations together. Since y and -y cancel out you get
7x=18
x=18/7
And to solve for y, plug x into one of the equations

x=18/7 and y=23/7 is your final answer
-Bryan
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