2*(2*x)=1*x2/3-1/4(2*x)=1/3-1/4x2/3-1/4(2/3-1/4x)=1/3-1/4x2/3-1/6+1/16x=1/3-1/4x1/16x+1/4x=1/3+1/6-2/35/16x=-1/6x=-8/15
1