Question 1209143
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<pre>

From the first equation, substitute y = 4x into the second equation.


You will get

    8x - 4(4x) = -40,

    8x - 16x = -40

      -8x    = -40

        x    = {{{(-40)/(-8)}}} = {{{40/8}}} = 5.


Then from the first equation  y = 4x = 4*5 = 20.


<U>ANSWER</U>.  x= 5,  y= 20.
</pre>

Solved.