7=s+(-13)

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Solution for 7=s+(-13) equation: 



7=s+(-13)

We move all terms to the left:

7-(s+(-13))=0



We calculate terms in parentheses: -(s+(-13)), so:

s+(-13)

We add all the numbers together, and all the variables

s-13

Back to the equation:

-(s-13)



We get rid of parentheses

-s+13+7=0

We add all the numbers together, and all the variables

-1s+20=0

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

-s=-20

s=-20/-1

s=+20

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