Solve for I
I=2
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\frac{1}{2}I+1-I=0
Subtract I from both sides.
-\frac{1}{2}I+1=0
Combine \frac{1}{2}I and -I to get -\frac{1}{2}I.
-\frac{1}{2}I=-1
Subtract 1 from both sides. Anything subtracted from zero gives its negation.
I=-\left(-2\right)
Multiply both sides by -2, the reciprocal of -\frac{1}{2}.
I=2
Multiply -1 and -2 to get 2.
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