ws6025p09my1 ws6025p09my1
  • 01-12-2017
  • Mathematics
contestada

求解8 [7 - （6x - 6）] + 6x = 0。

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tynollette tynollette
  • 01-12-2017
先除掉小括号：
8[7-6x+6]+6x=0
8[13-6x]+6x=0
再除掉中括号：
104-48x+6x=0
-42x=-104
x=104/42=52/21

得数有点怪怪的，但我算了两边还是这个结果
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