from the sum of 3x - y+ 11 and -y -11 subtract 3x -y -11
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Answer:
Sum of (3x-y+11) + (-y-11)
3x-y+11-y-11
3x-2y
Difference of (3x-2y)-(3x-y-11)
3x-2y-3x+y+11
11-y
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