15=z-4

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Solution for 15=z-4 equation: 



15=z-4

We move all terms to the left:

15-(z-4)=0

We get rid of parentheses

-z+4+15=0

We add all the numbers together, and all the variables

-1z+19=0

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

-z=-19

z=-19/-1

z=+19

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