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प्रश्न
Simplify:
p + 2 (q − r − p)
बेरीज
उत्तर
p + 2 (q − r − p)
= p + 2 (q − r − p)
= p + 2q − 2r − 2p
= 2q − 2r − p
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Concept of Substitution
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