Question

4/x+5/y=7 ; 3/x+4/y=5​

Answer 1

Answer:

63738hsj 838926r7392

Answer 2

Answer:

x=1/3

Step-by-step explanation:

4/x+5/y=7

4y+5x /xy=7

4y+5x=7xy

5x=7xy-4y

5x=y(7x-4)

5x/7x-4=y

3/x+4/y =5

(3/x)+[4(7x-4)/5x]=5

15+28x-16/5x =5

28x-1 =25x

3x=1

x=1/3