Question 838570
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
{{{3x+y=11}}}
{{{3(18/7)+y=11}}}
{{{54/7+y=11}}}
{{{y=23/7}}}
x=18/7 and y=23/7 is your final answer
-Bryan