If 5/(a - 5) = -7/(a + 7), then a = ?  Pick one.
A) -31/6
B) -35/6
C) -33/6
D) -29/6
E) -37/6
Multiply all terms of the given equation by (a - 5)(a + 7), simplify and solve   (a - 5)(a + 7)[ 5/(a - 5) ] = (a - 5)(a + 7) [ -7/(a + 7) ]   5 (a + 7) = -7 (a - 5)   a = -35/6   correct answer -35/6
<result>B</result>
If 5/(a - 5) = -7/(a + 7), then a = ?