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28.7=17+3x

We move all terms to the left:

28.7-(17+3x)=0

We add all the numbers together, and all the variables

-(3x+17)+28.7=0

We get rid of parentheses

-3x-17+28.7=0

We add all the numbers together, and all the variables

-3x+11.7=0

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

-3x=-11.7

x=-11.7/-3

x=3+2.7/3

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