a+2.9=2a-21.1

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Solution for a+2.9=2a-21.1 equation: 



a+2.9=2a-21.1

We move all terms to the left:

a+2.9-(2a-21.1)=0

We get rid of parentheses

a-2a+21.1+2.9=0

We add all the numbers together, and all the variables

-1a+24=0

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

-a=-24

a=-24/-1

a=+24

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