12=a-4.5

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Solution for 12=a-4.5 equation: 



12=a-4.5

We move all terms to the left:

12-(a-4.5)=0

We get rid of parentheses

-a+4.5+12=0

We add all the numbers together, and all the variables

-1a+16.5=0

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

-a=-16.5

a=-16.5/-1

a=16+0.5/1

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