You can
put this solution on YOUR website!
multiply this equation by -3

now add the first equation to this one

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Use this value for y in one the two original equations and solve for x
the resulting x,y pair is the solution
Here is a URL of the plot --> http://www.wolframalpha.com/input/?i=6x-4y%3D11+AND+2x%2B3y%3D-4