Question 1141757
.


            On the way, Edwin made an error in treating his system of equations.

            So I came to bring the correct solution.



<pre>
From the condition, you have these two equations in two unknowns


     x + 2y = 11     (1)

    2x +  y = 31     (2)


From equation (1), express  x = 11 - 2y  and substitute it into the second equation. You will get


   2*(11-2y) + y = 31.


Simplify and solve for y


    22 - 4y + y = 31

    -3y         = 31 - 22

    -3y         = 9

      y         = {{{9/(-3)}}} = -3.


Then  x = 11 - 2y = 11 - 2*(-3) = 11 + 6 = 17


<U>ANSWER</U>.  x = 17,  y = -3.
</pre>