2[1-1/3(x-x+1/3)]=3[x/6-1/2(2x-10−7x3)].
问题描述:
2[1-
(x-1 3
)]=3[x+1 3
-x 6
(2x-1 2
)]. 10−7x 3
答
去中括号得:2-
(x-2 3
)=x+1 3
-x 2
(2x-3 2
),10−7x 3
去小括号得:2-
x+2 3
=2x+2 9
-3x+x 2
,10−7x 2
去分母得:36-12x+4x+4=9x-54x+90-63x,
移项合并得:100x=50,
化系数为1得:x=
.1 2