(1-5,1х)-(1,7х+5,4)=1

(1-5,1х)-(1,7х+5,4)=11-5,1х-1,7х-5,4=1-6,8x=1-1+5,4x=5,4:(-6,8)=-2.7:3.4=27/342 7/10=(7+2×10)/10=27/103 4/10=(4+3×10)/10=34/1027/10:34/10=27/10×10/34=27/34