The sum of x - 4xy + z and 2xy + 2z + 2xy - 4x wil be
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(x+3y−4z)+(2x+y−z)+(−2x+3y−z)−(2x−4y+3z)
=(x+2x+3y+y−4z−z)+(−2x+3y−z)−(2z−4y+3z)
=(3x+4y−5z)+(−2x+3y−z)−(2x−4y+3z)
=(x+7y−6z)−(2x−4y+3z)
=x−2x+7y+4y−6z−3z
=−x+11y−9z
∴ Ans :−(−x+11y−9z)
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Answer:
(i) 3x + 7x = (3 + 7)x = 10x
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