移项得0.1(x-1-x+1+0.1x-0.1+2)=10.1x+1.9=10解得x=81
1+1/10(x-1)=2+1/10{x-[1+1/10(x-1)]-2}1/10(x-1)=1+1/10{x-[1+1/10(x-1)]-2}x-1=10+x-[1+1/10(x-1)]-2-1=10-1-1/10(x-1)-21/10(x-1)=8x-1=80x=81