Question

8/x+9/y=7 , 6(1/x+1/y)=1​

Answer 1

Answer:

x=-2/11; y=3/17

Step-by-step explanation:

6/x+6/y=1

8/x+9/y=7

let 1/x=v & 1/y=u then

6v+6u=1------(1)

8v+9u=7-----(2)

6v=1-6u

v=1-6u/6

put this in eq (2)

8(1-6u/6)+9u=7

8-48u+54u=42

6u=42-8

u=34/6

u=17/3

u=1/y

y=1/u

y=3/17----@

6v=1-6u

6v=1-6(17/3)

6v= -33

v= -33/6

v= -11/2

x=1/v

x= -2/11-------@

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