What should be subtracted from 3p - 8q + 18 so that the answer would -2q + 2p - 9.
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The number should be subtracted is_
(3p-8q+18) - (-2q +2p -9)
= 3p -8q + 18 + 2q - 2p +9
= 3p -2p -8q+2q+18+9
= p-6q+27
(Ans): p-6q+27
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