a-(-11)=21

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Solution for a-(-11)=21 equation: 



a-(-11)=21

We move all terms to the left:

a-(-11)-(21)=0

determiningTheFunctionDomain
a-21-(-11)=0

We add all the numbers together, and all the variables

a-10=0

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

a=10

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