Question

if x/y =(3/4)^-3÷(4/5)^0 find (x/y)^-2​

Answer 1

Answer:

Given equations are xy+x+y=23

⇒x(y+1)=23−y

⇒x=y+123−y    ........(i),

yz+y+z=27

⇒z(y+1)=27−z

⇒z=y+127−y     ...........(ii)

and xz+x+z=41    .....(iii)

Substituting (i) and (ii), we get

(y+123−y)(y+127−y)+y+123−y+y+127−z=41⇒(y+1)2621+y2−50y+y+150−2y=41⇒(y+1)2621+y2−50y+(50−2y)(y+1)=41⇒621+

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