1.8*1.2-8x-1.3*1.2-1.8x=6x-0.16 0.6-9.8x=6x-0.16 15.8x=0.76 x=38/79 2.3/4(4/3×1/2x-4/3×1/团塌4-8)=3/2x 1/2x-1/4-6=3/悄拍2x 1/塌运圆2x-3/2x=25/4 x=-25/4