-3.9=x-6.4

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Solution for -3.9=x-6.4 equation: 



-3.9=x-6.4

We move all terms to the left:

-3.9-(x-6.4)=0

We get rid of parentheses

-x+6.4-3.9=0

We add all the numbers together, and all the variables

-1x+2.5=0

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

-x=-2.5

x=-2.5/-1

x=2+0.5/1

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