add the expression 5p+2q-7r+3, 2r-4p-8, 11q - 8p + 3r -1 and 3q-2r+5
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Answer:
-4p+13q-4r-1
Explanation:
5p-4p-8p=-7p
2q+11q+3q=16q
-7r+2r+3r-2r=-4r
3-8-1+5=-1
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