13.9=x+2.1

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Solution for 13.9=x+2.1 equation: 



13.9=x+2.1

We move all terms to the left:

13.9-(x+2.1)=0

We get rid of parentheses

-x-2.1+13.9=0

We add all the numbers together, and all the variables

-1x+11.8=0

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

-x=-11.8

x=-11.8/-1

x=11+0.8/1

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