10=a-(-1)

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Solution for 10=a-(-1) equation: 



10=a-(-1)

We move all terms to the left:

10-(a-(-1))=0



We calculate terms in parentheses: -(a-(-1)), so:

a-(-1)

We add all the numbers together, and all the variables

a+1

Back to the equation:

-(a+1)



We get rid of parentheses

-a-1+10=0

We add all the numbers together, and all the variables

-1a+9=0

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

-a=-9

a=-9/-1

a=+9

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