Question

Solve the following systems of equations:
5/(x+y) -2/(x-y) =-1
15/(x+y) +7/(x-y) =10

Answer 1

Then, the given system off equations becomes

Multiplying equation (i) by 7, and equation (ii) by 2, we get

Putting u = 1/5 in equation (i) we get 

Adding equation (v) and equation (vi), we get

Hence, solution of the given system of equation is x= 3, y=2