20.91=x+3.4

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Solution for 20.91=x+3.4 equation: 



20.91=x+3.4

We move all terms to the left:

20.91-(x+3.4)=0

We get rid of parentheses

-x-3.4+20.91=0

We add all the numbers together, and all the variables

-1x+17.51=0

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

-x=-17.51

x=-17.51/-1

x=17+0.51/1

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