Question

solve x and y : 5/x+y +1/x-y=2 & 15/x+y - 5/x-y​

Answer 1

which of the following is the function

Explanation:

okay

Answer 2

Explanation:

+1 vote answered Aug 29, 2018 by AmirMustafa (60.0k points) selected Sep 16, 2018 by Vikash Kumar The given equations are 5/ x+y - 2/ x-y = -1 ……(i) 15/ x+y - 7/x-y= 10 ……(ii) Substituting 1/x+y = u and 1/x-y = v in (i) and (ii), we get 5u – 2v = -1 ……..(iii) 15u + 7v = 10 …….(iv) Multiplying (iii) by 3 and subtracting it from (iv), we get 7v + 6v = 10 + 3 ⇒13v = 13 ⇒v = 1 ⇒x – y = 1 (∵ 1/ x-y = ) …..(v) Now, substituting v = 1 in (iii), we get 5u – 2 = -1 ⇒5u = 1 ⇒u = 1/ 5 x + y = 5 …….(vi) Adding (v) and (vi), we get 2x = 6 ⇒ x = 3 Substituting x = 3 in (vi), we have 3 + y = 5 ⇒ y = 5 – 3 = 2 Hence, x = 3 and y = 2. Read more on Sarthaks.com - https://www.sarthaks.com/130376/solve-for-x-and-y-5-x-y-2-x-y-1-15-x-y-7-x-y-10