120=0.4x

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Solution for 120=0.4x equation: 



120=0.4x

We move all terms to the left:

120-(0.4x)=0

We add all the numbers together, and all the variables

-(+0.4x)+120=0

We get rid of parentheses

-0.4x+120=0

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

-0.4x=-120

x=-120/-0.4

x=+300

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