x+3.1=15.9+9x

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Solution for x+3.1=15.9+9x equation: 



x+3.1=15.9+9x

We move all terms to the left:

x+3.1-(15.9+9x)=0

We add all the numbers together, and all the variables

x-(9x+15.9)+3.1=0

We get rid of parentheses

x-9x-15.9+3.1=0

We add all the numbers together, and all the variables

-8x-12.8=0

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

-8x=12.8

x=12.8/-8

x=-1+1/1.6666666666667

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