x-0.4=2.1

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Solution for x-0.4=2.1 equation: 



x-0.4=2.1

We move all terms to the left:

x-0.4-(2.1)=0

We add all the numbers together, and all the variables

x-2.5=0

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

x=2.5

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