-(x-5)+(-5+6x)-(7x-1)其中x=-3
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-(x-5)+(-5+6x)-(7x-1)其中x=-3-(x-5)+(-5+6x)-(7x-1)其中x=-3-(x-5)+(-5+6x)-(7x-1)其中x=-3原式=-x+5-5+6x-7x+1=-
-(x-5)+(-5+6x)-(7x-1)其中x=-3
-(x-5)+(-5+6x)-(7x-1)其中x=-3
-(x-5)+(-5+6x)-(7x-1)其中x=-3
原式=-x+5-5+6x-7x+1
=-2x+1
=6+1
=7
37
-(x-5)+(-5+6x)-(7x-1)=-x+5-5+6x-7x+1
=-2x+1=-2*(-3)+1
=7
原式=-x+5-5+6x-7x+1=-2x+1 当x=-3时,原式=-2x+1=6+1=7
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