- #1

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## Homework Statement

There is a current of 0.25 A in the circuit of the figure

What is the value of the resistance R?

## Homework Equations

V = IR

## The Attempt at a Solution

since the circuit is in series:

V = 6+ 12 = 18V

Req = R + 6 + 12

V = IReq

Req = 18/0.25 = 72

72 = 18+ R

R = 54

but the answer is wrong !

help