-15-z=-7

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Solution for -15-z=-7 equation: 



-15-z=-7

We move all terms to the left:

-15-z-(-7)=0

We add all the numbers together, and all the variables

-1z-8=0

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

-z=8

z=8/-1

z=-8

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