7=z-15

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Solution for 7=z-15 equation: 



7=z-15

We move all terms to the left:

7-(z-15)=0

We get rid of parentheses

-z+15+7=0

We add all the numbers together, and all the variables

-1z+22=0

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

-z=-22

z=-22/-1

z=+22

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