39=3.9x

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Solution for 39=3.9x equation: 



39=3.9x

We move all terms to the left:

39-(3.9x)=0

We add all the numbers together, and all the variables

-(+3.9x)+39=0

We get rid of parentheses

-3.9x+39=0

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

-3.9x=-39

x=-39/-3.9

x=+10

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