7-15=4z

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Solution for 7-15=4z equation: 



7-15=4z

We move all terms to the left:

7-15-(4z)=0

We add all the numbers together, and all the variables

-4z-8=0

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

-4z=8

z=8/-4

z=-2

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