Question

please answer this question​

Answer 1

Answer:

Requivalent in upper branch =10+X

Requivalent in lower branch =20+75

=95

given Requivalent of the entire circuit is 20

therefore 1/10+x +1/95=1/Requivalent(20)

=1/20-1/95=1/10+X

19-4/380=1/10+x

15/380=1/10+x

10+x=380/15

10+x=76/3

=x=76/3-10

=x=46/3

or x=15.33