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## Homework Statement

Apply the mesh current method to find I

_{0}

## Homework Equations

Mesh current method

## The Attempt at a Solution

On the left bottom square circuit, I set a mesh current, I

_{1}, and on the right bottom square circuit, I set a mesh current, I

_{2}.

Then, I

_{0}=I

_{1}-I

_{2}.

Since there is a current source on the mesh I

_{1}, I

_{1}=-5 (negative sign because of the direction.)

and

(1+2+4)I

_{2}+22.5=0, so I

_{2}=(-22.5)/7.

Therefore, I

_{0}=-5-(-22.5)/7=(-12.5)/7.

Am I doing it right?