5p - 3q - 2r from 7p + 2q - 5r
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2p-1q+3r is the correct answer
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7p+2p-5r-5p-3q-5r
7p-5p+2q-3q-5r-5r
2p-q+10q
7p-5p+2q-3q-5r-5r
2p-q+10q
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