15-a=16.5

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Solution for 15-a=16.5 equation: 



15-a=16.5

We move all terms to the left:

15-a-(16.5)=0

We add all the numbers together, and all the variables

-1a-1.5=0

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

-a=1.5

a=1.5/-1

a=-1+0.5/1

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