(3,7x-2)(3,7x+2)-(1,3x-1)(1,3x+1)=6x(2x-1)
(3,7x-2)(3,7x+2)-(1,3x-1)(1,3x+1)=6x(2x-1)
13,69x^2-3-1,69x^2+1=12x^2-6x
6x=2
x=2/6=1/3