I2(4-x)=12-3x

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Solution for I2(4-x)=12-3x equation: 



2(4-I)=12-3I

We move all terms to the left:

2(4-I)-(12-3I)=0

We add all the numbers together, and all the variables

2(-1I+4)-(-3I+12)=0

We multiply parentheses

-2I-(-3I+12)+8=0

We get rid of parentheses

-2I+3I-12+8=0

We add all the numbers together, and all the variables

I-4=0

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

I=4

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