Question

Solve for x and y 12/x+y + 21/x-y = 7​

Answer 1

12/x+y + 21/x-y = 7

12/x+y + 21/x-y take Lcm  for x+y and x-y

12x - 12y / x^2 - y^2  +   21x +21y /  x^2 - y^2

33x + 9y / x^2 - y^2  = 7

7x - 7 y = 33x +9y

-16= y

26= x

Answer 2

Step-by-step explanation:

Solution,

12 + 21 = 7

x + y x - y

or, 12(x-y) + 21 (x+y) = 7

(x^2 - y^2)

or, 12x - 12y + 21x + 21y = 7

(x^2 + y^2)

or, 33x - 9y = 7

(x^2 - y^2)

or, 33x - 9y = 7 ( x^2 - y^2)

or, 33x - 9y = 7x^2 - 7y^2

or, 33x - 7x^2 = 9y - 7y^2