-9=x-3,900

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Solution for -9=x-3,900 equation: 



-9=x-3.900

We move all terms to the left:

-9-(x-3.900)=0

We add all the numbers together, and all the variables

-(x-3.9)-9=0

We get rid of parentheses

-x+3.9-9=0

We add all the numbers together, and all the variables

-1x-5.1=0

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

-x=5.1

x=5.1/-1

x=-5+0.1/1

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