If 3x+y=40, 2x-y=20, for integers of x and y, 4y^2=?  Pick one.
A) 2	B) 4	C) 0	D) 10	E) 64
3x+y = 40   2x-y = 20   5x = 60   x = 12   y = 4   4y^2 = 4*16= 
<gadget id="calculator">4*16</gadget>
<output>64</output>
64   Answer is 64
<result>E</result>
If 3x+y=40, 2x-y=20, for integers of x and y, 4y^2=?