解6(x一9)一22(x十2)=66(x一1)一33(x一2)
1个回答
6(x一9)一22(x十2)=66(x一1)一33(x一2)
6x-54-22x-44=66x-66-33x+66
6x-22x-66x+33x=-66+66+54+44
-49x=98
x=-2
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