-1/2×(2/3x-2/5)-1/3×(3x-1/2=1/4-5/9
-1/2×2/3x= -1/3x -1/2×(-2/5)=1/5 -1/3×3x= -x -1/3×(-1/2)=1/6 1/4-5/9=9/36-20/36= -11/36 -1/3x+1/5-x+1/6= -11/36 -1/3x-x= -11/36-11/30 -1 1/3x= -55/180-66/180 -4/3 x= -121/180 x=121/180×3/4=121/240