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The 12Ω and 6Ω resistors are in parallel, so their equivalent resistance is R
1
=12×6/(12+6)=4Ω.
The 7Ω and 5Ω resistors are in series, so their equivalent resistance is R
2
=7+5=12Ω.
The R
1
=4Ω and R
2
=12Ω are in parallel, so their equivalent resistance is R
3
=12×4/(12+4)=3Ω
Now this R
3
=3Ω and 7Ω are in series, so the equivalent resistance is 7+3=10Ω
So the equivalent resistance of circuit is 10Ω
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