(-2a)-(-9)=39

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Solution for (-2a)-(-9)=39 equation: 



(-2a)-(-9)=39

We move all terms to the left:

(-2a)-(-9)-(39)=0

determiningTheFunctionDomain
(-2a)-39-(-9)=0

We add all the numbers together, and all the variables

(-2a)-30=0

We get rid of parentheses

-2a-30=0

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

-2a=30

a=30/-2

a=-15

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