7=z+-5

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Solution for 7=z+-5 equation: 



7=z+-5

We move all terms to the left:

7-(z+-5)=0

We add all the numbers together, and all the variables

-(z-5)+7=0

We get rid of parentheses

-z+5+7=0

We add all the numbers together, and all the variables

-1z+12=0

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

-z=-12

z=-12/-1

z=+12

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