81=51+i

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Solution for 81=51+i equation: 



81=51+i

We move all terms to the left:

81-(51+i)=0

We add all the numbers together, and all the variables

-(i+51)+81=0

We get rid of parentheses

-i-51+81=0

We add all the numbers together, and all the variables

-1i+30=0

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

-i=-30

i=-30/-1

i=+30

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