化简9X-{6-〔-3x+(-1-4x)〕+2x}一步步的计算哦
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化简9X-{6-〔-3x+(-1-4x)〕+2x}一步步的计算哦
化简9X-{6-〔-3x+(-1-4x)〕+2x}
一步步的计算哦
化简9X-{6-〔-3x+(-1-4x)〕+2x}一步步的计算哦
9X-{6-〔-3x+(-1-4x)〕+2x}
=9x-{6-[-3x-1-4x]+2x}
=9x-{6+3x+1+4x+2x}
=9x-{9x+7}
=9x-9x-7
=-7
=9x-(6-(-7x-1)+2x)
=9x-6-7x-1-2x
=-7
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