a-(-3)=12

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Solution for a-(-3)=12 equation: 



a-(-3)=12

We move all terms to the left:

a-(-3)-(12)=0

determiningTheFunctionDomain
a-12-(-3)=0

We add all the numbers together, and all the variables

a-9=0

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

a=9

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