13=2t-(-7)

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Solution for 13=2t-(-7) equation: 



13=2t-(-7)

We move all terms to the left:

13-(2t-(-7))=0



We calculate terms in parentheses: -(2t-(-7)), so:

2t-(-7)

We add all the numbers together, and all the variables

2t+7

Back to the equation:

-(2t+7)



We get rid of parentheses

-2t-7+13=0

We add all the numbers together, and all the variables

-2t+6=0

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

-2t=-6

t=-6/-2

t=+3

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