2a-21.6=20.5

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Solution for 2a-21.6=20.5 equation: 



2a-21.6=20.5

We move all terms to the left:

2a-21.6-(20.5)=0

We add all the numbers together, and all the variables

2a-42.1=0

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

2a=42.1

a=42.1/2

a=21+0.1/2

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