2分之x-1减5分之x+2=3分之x-1
两边同乘以30得:
15(x-1)-6(x+2)=10(x-1)
5(x-1)-6(x+2)=0
5x-5-6x-12=0
x=-17
两边乘30
15(x-1)-6(x+2)=10(x-1)
15x-15-6x-12=10x-10
9x-27=10x-10
10x-9x=-27+10
x=-17
去分母得15(x-1)-6(x+2)=10(x-1)
去括号得15x-15-6x-12=10x-10
移项得 15x-6x-10x=-10+15+12
合并同类项得 -x=17
系数化1得 x=-17
原式*30
得15X-30-6X+60=10X-30
9X+60=10X
X=60