Determine whether the equation is exact. If it is, then solve it. e¹(7y - 9t)dt + (8 + 7e¹) dy = 0 Select the correct choice below and, if necessary, fill in the answer box to complete your choice. OA. The equation is exact and an implicit solution in the form F(t,y) = C is (Type an expression using t and y as the variables.) OB. The equation is not exact. ... = C, where C is an arbitrary constant.

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