作业帮-12.75x(-0.75)+(-1.75)X四分之三简便方法?发错了,是-2.75x(-0.75)+(-1.75)X四分之三简便方法
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-12.75x(-0.75)+(-1.75)X四分之三简便方法?发错了,是-2.75x(-0.75)+(-1.75)X四分之三简便方法
-12.75x(-0.75)+(-1.75)X四分之三简便方法?
发错了,是-2.75x(-0.75)+(-1.75)X四分之三简便方法
-12.75x(-0.75)+(-1.75)X四分之三简便方法?发错了,是-2.75x(-0.75)+(-1.75)X四分之三简便方法
-2.75x(-0.75)+(-1.75)X四分之三
= -2.75*(-0.75)+1.75*(-0.75)
= -0.75*(-2.75+1.75)
= -0.75*(-1)
=0.75
x-0.75x
x+0.75x/0.
（1.7-2x）/0.3=x/0.7-1,（3+0.2x）/0.2-(0.2+0.03x)/0.01=0.75
2.6x-x-0.1x=0.75
X-15%X=1.7
0.75x+x=17.5
x-25%x=0.75
x-0.75x=1.
-12.75x(-0.75)+(-1.75)X四分之三简便方法?发错了,是-2.75x(-0.75)+(-1.75)X四分之三简便方法
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