1 (x+2)/5-(x-1)=(x+3)/3-(x-2)/2
方程两边同时乘以30得:
6 (x+2)-30(x-1)=10(x+3)-15(x-2)
6x+12-30x+30=10x+30-15x+30
-19x=18
x=-18/19
2、
(0.3x-0.2)/0.02-(x+1)/0.5=2
方程两边同时乘以50得:
(0.3x-0.2)-25(x+1)=100
-24.7x=125.2
x=5.06