2a-20.9=a+2.1

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Solution for 2a-20.9=a+2.1 equation: 



2a-20.9=a+2.1

We move all terms to the left:

2a-20.9-(a+2.1)=0

We get rid of parentheses

2a-a-2.1-20.9=0

We add all the numbers together, and all the variables

a-23=0

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

a=23

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