If 4/(a - 5) = 5/(a + 5), then a = ?  Choose the most appropriate option:	A) 40	B) 45	C) 35	D) 55	E) 50
Multiply all terms of the given equation by (a - 5)(a + 5), simplify and solve   (a - 5)(a + 5)[ 4/(a - 5) ] = (a - 5)(a + 5) [5/(a + 5) ]   4 (a + 5) = 5 (a - 5)   a =45   correct answer 45
<result>B</result>
If 4/(a - 5) = 5/(a + 5), then a = ?