3.9=4.5-0.2x

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Solution for 3.9=4.5-0.2x equation: 



3.9=4.5-0.2x

We move all terms to the left:

3.9-(4.5-0.2x)=0

We add all the numbers together, and all the variables

-(-0.2x+4.5)+3.9=0

We get rid of parentheses

0.2x-4.5+3.9=0

We add all the numbers together, and all the variables

0.2x-0.6=0

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

0.2x=0.6

x=0.6/0.2

x=2+0.2/0.2

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