Question

solve 2/x+3/y=9/xy ; 4/x+9/y=21/xy (x and y are not equal to 0​

Answer 1

Answer:

xbxvxvdvvvxgv

Step-by-step explanation:

bxhdvvdvvv73y4r7eue6ye63y7uye

Answer 2

Answer:

1, 3

Step-by-step explanation:

2/x + 3/y= 9/xy ; 4/x + 9/y = 21/xy

let 1/x be u and 1/y be v

2u + 3v = 9uv ; 4u + 9v = 21uv

Dividing both equations by uv

2/v + 3/u =9 ; 4/v + 9/u = 21

let 1/u be m and 1/v be n

2n + 3m = 9 (1) ; 4n + 9m = 21 (2)

multiplying (1) by 2 on both sides

4n + 6n = 18 (3)

Subtracting (3) from (2)

3m = 3

m = 1

Putting the value of m in (1)

2n + 3 = 9

2n = 6

n = 3

If 1/u = m, then 1/u = 1 => u =1

If 1/v = n , then 1/v =3 => v= 1/3

If 1/x = u, then 1/x = 1 => x = 1

If 1/y = v, then 1/y = 1/3 => y = 3

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