1.9=5.5-0.4x

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Solution for 1.9=5.5-0.4x equation: 



1.9=5.5-0.4x

We move all terms to the left:

1.9-(5.5-0.4x)=0

We add all the numbers together, and all the variables

-(-0.4x+5.5)+1.9=0

We get rid of parentheses

0.4x-5.5+1.9=0

We add all the numbers together, and all the variables

0.4x-3.6=0

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

0.4x=3.6

x=3.6/0.4

x=9

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