3x-y=m① 5x+2y=m+1②①×2+②6x+5x=2m+m+111x=3m+1x=(3m+1)/11∴y=3(3m+1)/11-m=(9m+3-11m)/11=(3-2m)/11∵2×(3m+1)/11+3×(3-2m)/11=(6m+2+9-6m)/11=1∴方程组 3x-y=m① 5x+2y=m+1② 的解是方程2x+3y=1的解...