计算:7x-{-3x+[-2x-(8x-1)]-4}

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计算:7x-{-3x+[-2x-(8x-1)]-4}
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计算:7x-{-3x+[-2x-(8x-1)]-4}
计算:7x-{-3x+[-2x-(8x-1)]-4}

计算:7x-{-3x+[-2x-(8x-1)]-4}
7x-{-3x+[-2x-(8x-1)]-4}
=7x-[-3x+(-2x-8x+1)-4]
=7x-(-3x-2x-8x+1-4)
=7x-(-13x-3)
=7x+13x+3
=20x+3

20x+3