4z=15-31

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Solution for 4z=15-31 equation: 



4z=15-31

We move all terms to the left:

4z-(15-31)=0

We add all the numbers together, and all the variables

4z-(-16)=0

We add all the numbers together, and all the variables

4z+16=0

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

4z=-16

z=-16/4

z=-4

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