2.1=3.1-0.5x

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Solution for 2.1=3.1-0.5x equation: 



2.1=3.1-0.5x

We move all terms to the left:

2.1-(3.1-0.5x)=0

We add all the numbers together, and all the variables

-(-0.5x+3.1)+2.1=0

We get rid of parentheses

0.5x-3.1+2.1=0

We add all the numbers together, and all the variables

0.5x-1=0

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

0.5x=1

x=1/0.5

x=2

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