5.5=7.5-0.4x

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Solution for 5.5=7.5-0.4x equation: 



5.5=7.5-0.4x

We move all terms to the left:

5.5-(7.5-0.4x)=0

We add all the numbers together, and all the variables

-(-0.4x+7.5)+5.5=0

We get rid of parentheses

0.4x-7.5+5.5=0

We add all the numbers together, and all the variables

0.4x-2=0

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

0.4x=2

x=2/0.4

x=5

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