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Question

solve the following equation by reducing method
x + y/xy = 2
x-y/xy = 6

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Solution

The given system of equations is : x+yxy = 21y + 1x = 21x + 1y = 2 ....1and x-yxy = 61y - 1x =6-1x + 1y = 6 ....2Put 1x = u and 1y = v, the above system of equations reduces tou + v = 2 ....3-u + v = 6 .....4Adding 3 and 4, we get2v = 8 v = 4Now, from 3, we getu + 4 = 2 u = -2Now, 1x = u x = 1u = -12Now, 1y = v y = 1v = 14So, x = -12; y = 14 is the solution.

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