What is the solution of the equations x - y = 10 and (x + y)-1 = 2 ?  Choose the correct choice from the following answers.
A) x = 3.2, y = 2.3	B) x = 5.25, y = 4.75	C) x = 2, y = 1.1	D) x = 1.2, y = 0.3	E) None
Answer   x - y = 10 ...(i)   and 1/(x + y)-1=2   ⇒ 1/ (x + y) = 2   ⇒ 2(x + y) =1   ⇒ x + y = 1/2 ...(ii)   On solving Eqs.(i) and (ii),we get   x = 5.25   and y = 4.75   Correct Option: x = 5.25, y = 4.75
<result>B</result>
What is the solution of the equations x - y = 10 and (x + y)-1 = 2 ?