From the sum of 3x – y + 11 and -y – 11, subtract 3x – y – 11.
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Answer:
3x- y + 11 + (-y-11)
=3x - y + 11 - y - 11
=3x - 2y
Then,
3x - 2y - 3x - y - 11
= - 3y - 11(Ans)
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