6.8x一0.8+3.5=8.6x解：6.8x+2.7=8.6x8.6x-6.8x=2.71.8x=2.7x=2.7÷1.8x=1.5
8.6x-6.8x=2.71.8x=2.7x=1.5
x=2.7/1.7
x=1.4
