If 'a' and 'b' are non-zero numbers such that their sum is seven times the product, what is the value of 1/a + 1/b?  Choices:
A) 6
B) 7
C) 8
D) 14
E) 21
a+b = 7ab   1/a + 1/b = (b + a)/(ab) = 7.   The answer is 7.
<result>B</result>
If 'a' and 'b' are non-zero numbers such that their sum is seven times the product, what is the value of 1/a + 1/b?