a+1.2=2a-21.8=a-3.5=19.5

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Solution for a+1.2=2a-21.8=a-3.5=19.5 equation: 



a+1.2=2a-21.8=a-3.5=19.5

We move all terms to the left:

a+1.2-(2a-21.8)=0

We get rid of parentheses

a-2a+21.8+1.2=0

We add all the numbers together, and all the variables

-1a+23=0

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

-a=-23

a=-23/-1

a=+23

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