2x-1分之x-1+1-2x分之5x-8=-2求X
问题描述:
2x-1分之x-1+1-2x分之5x-8=-2
求X
答
(2x-1)分之(x-1)+(1-2x)分之(5x-8)=-2
(2x-1)分之(x-1)-(2x-1)分之(5x-8)=-2
x-1-5x+8=-2x+1
-4x+2x=1-7
-2x=-6
x=3