subtract(3x-4y+5z)from the sum of(x+2y-3z),(7x-y+6z)and(-4y+7z-x)
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Answer:
X+2y-3z+7x-y+6z-4y+7z-x-(3x-4y+5z)
=8x-3y+10z-3x+4y-5z
=5x+y+5z
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