-2z-3=z-15

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Solution for -2z-3=z-15 equation: 



-2z-3=z-15

We move all terms to the left:

-2z-3-(z-15)=0

We get rid of parentheses

-2z-z+15-3=0

We add all the numbers together, and all the variables

-3z+12=0

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

-3z=-12

z=-12/-3

z=+4

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