7=-(a-10)

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Solution for 7=-(a-10) equation: 



7=-(a-10)

We move all terms to the left:

7-(-(a-10))=0



We calculate terms in parentheses: -(-(a-10)), so:

-(a-10)

We get rid of parentheses

-a+10

We add all the numbers together, and all the variables

-1a+10

Back to the equation:

-(-1a+10)



We get rid of parentheses

1a-10+7=0

We add all the numbers together, and all the variables

a-3=0

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

a=3

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