13=z-(-4)

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Solution for 13=z-(-4) equation: 



13=z-(-4)

We move all terms to the left:

13-(z-(-4))=0



We calculate terms in parentheses: -(z-(-4)), so:

z-(-4)

We add all the numbers together, and all the variables

z+4

Back to the equation:

-(z+4)



We get rid of parentheses

-z-4+13=0

We add all the numbers together, and all the variables

-1z+9=0

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

-z=-9

z=-9/-1

z=+9

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