图
(2/3)x+1/4=3/8(2/3)x=3/8-1/4=1/8x=(1/8)/(2/3)=3/16
2/3x+1/4=3/82/3x=3/8-1/42/3x=1/8x=3/16
2x/3+1/4=3/82x/3=3/8-1/42x/3=1/8x=1/8*3/2x=3/16