2p - 3{3(2p – 3q) – 49 – 3p)}
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➟ 2p – 3[{3(2p – 3q) – 49 – 3p}]
➟ 2p – 3[{6p – 9q – 49 – 3p}]
➟ 2p – 3[3p – 9q – 49]
➟ 2p – 9p + 27q + 147
➟ 27q – 7p + 147
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