3a-(-1)=7

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Solution for 3a-(-1)=7 equation: 



3a-(-1)=7

We move all terms to the left:

3a-(-1)-(7)=0

determiningTheFunctionDomain
3a-7-(-1)=0

We add all the numbers together, and all the variables

3a-6=0

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

3a=6

a=6/3

a=2

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