15=a-5.5

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Solution for 15=a-5.5 equation: 



15=a-5.5

We move all terms to the left:

15-(a-5.5)=0

We get rid of parentheses

-a+5.5+15=0

We add all the numbers together, and all the variables

-1a+20.5=0

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

-a=-20.5

a=-20.5/-1

a=20+0.5/1

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