-13=z+-7

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Solution for -13=z+-7 equation: 



-13=z+-7

We move all terms to the left:

-13-(z+-7)=0

We add all the numbers together, and all the variables

-(z-7)-13=0

We get rid of parentheses

-z+7-13=0

We add all the numbers together, and all the variables

-1z-6=0

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

-z=6

z=6/-1

z=-6

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