I2=4-x

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Solution for I2=4-x equation: 



2=4-I

We move all terms to the left:

2-(4-I)=0

We add all the numbers together, and all the variables

-(-1I+4)+2=0

We get rid of parentheses

1I-4+2=0

We add all the numbers together, and all the variables

I-2=0

We move all terms containing I to the left, all other terms to the right

I=2

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