1.9=3.9-0.5x

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Solution for 1.9=3.9-0.5x equation: 



1.9=3.9-0.5x

We move all terms to the left:

1.9-(3.9-0.5x)=0

We add all the numbers together, and all the variables

-(-0.5x+3.9)+1.9=0

We get rid of parentheses

0.5x-3.9+1.9=0

We add all the numbers together, and all the variables

0.5x-2=0

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

0.5x=2

x=2/0.5

x=4

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