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By mesh analysis find the current through 4 ohm resistor for the given circuit shown below.
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Applying KVL to Mesh 1, 

1212I110(I1I2)1(I1I3)=013I110I2I3=12........................(1)

Applying KVL to Mesh 2, 

10(I2I1)102I23(I2I3)=010I1+15I23I3=0..........................(2)

Applying KVL to Mesh 3, 

1(I3I1)3(I3I2)4I3+24=0I13I2+8I3=24.....................................(3)

Writing equations in the matrix form

[1310110153138][I1I2I3]=[121024]

Solving above equations we get, 

I1=2.79 A;I2=2.01 A;I3=4.1 A;I4Ω=I3=4.1 A

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