7=z+-7

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Solution for 7=z+-7 equation: 



7=z+-7

We move all terms to the left:

7-(z+-7)=0

We add all the numbers together, and all the variables

-(z-7)+7=0

We get rid of parentheses

-z+7+7=0

We add all the numbers together, and all the variables

-1z+14=0

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

-z=-14

z=-14/-1

z=+14

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