12z+2z+4z-9z-5z=4

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Solution for 12z+2z+4z-9z-5z=4 equation: 



12z+2z+4z-9z-5z=4

We move all terms to the left:

12z+2z+4z-9z-5z-(4)=0

We add all the numbers together, and all the variables

4z-4=0

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

4z=4

z=4/4

z=1

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