subtract ( 11x + 7y -3 ) from ( 9x - 21y -3)
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answer = -2x - 28y
= ( 11x + 7y -3 ) from ( 9x - 21y -3)
= 9x - 21y - 3 - ( 11x + 7y - 3)
= 9x - 21y - 3 - 11x - 7y + 3
= 9x - 11x -21y - 7y -3 +3
= -2x - 28y
hope it helps you....☺☺
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Answer:
11x + 7y -3 = 9x -21y -3
11x + 7y -3 = 9x -21y -3 11x - 9x + 7y + 21y = -3 +3
11x + 7y -3 = 9x -21y -3 11x - 9x + 7y + 21y = -3 +3 2x + 28y = 0
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