6q-p-3r from 4p-q+2r-7
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Answer:
7p−3q−8r−16
p−2q−5r−8−(−6p+q+3r+8)
=p−2q−5r−8+6p−q−3r−8
=p+6p−2q−q−5r−3r−8−8
=7p−3q−8r−16
Step-by-step explanation:
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