1: x+m = 2m-2x+12: 2x-12=3m+2-18 3x-1=m把m的值代入方程22x-12=3(3x-1)-167x=7x=1m=3* 1-1m=2
1: x+m = 2m-2x+12: 2x-12=3m+2-18 3x-1=m把m的值代入方程22x-12=9x-197x=7x=1m=2
分别求出X的解 ,然后再等起来,求出m=2