2.1-1.9=a

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Solution for 2.1-1.9=a equation: 



2.1-1.9=a

We move all terms to the left:

2.1-1.9-(a)=0

We add all the numbers together, and all the variables

-1a+0.2=0

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

-a=-0.2

a=-0.2/-1

a=0.2/1

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