Question

2/x + 3/y = 9/xy ; 4/x + 9/y = 21/xy find x and y by substituting method​

Answer 1

Answer:

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

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

2y=9-3x; 2(2y)+9x=21

2(9-3x)+9x=21

18-6x+9x=21

3x=21-18

3x=34

x=1

3x=9-2y; 4y+3(3x)=21

4y+3(9-2y)=21

4y+27-6y=21

-2y=21-27

-2y=-6

y=3

Step-by-step explanation:

the above solution is correct

when we substitute x and y values in given equation

now,

x=1;y=3 are substitute in the equation

2/x+3/y=9/xy

2/1+3/3=9/3

2+1=3

3=3

1=1;

and also substitute in equation

4/x+9/y=21/xy

4/1+9/3=21/3

4+3=7

7=7

1=1

hence solved

Answer 2

Hey Mate,

Hope uh got ur answer!!