Which of the following is the general solution to the differential equation (3х — у + 6)dx + (6х — 2у — 6)dy %3D 0 ? Зх + 7у + 9ln(21х—7у -12) 3С 7x + 14y + 18In(21x — 7у — 12) %3D С 7x + 14у + 18 In(49х + 18у + C) %3 54 Зх + 7у +9In(49х — 18у — 12) %3 С O A OD B.

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