3z+15z=12

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Solution for 3z+15z=12 equation: 



3z+15z=12

We move all terms to the left:

3z+15z-(12)=0

We add all the numbers together, and all the variables

18z-12=0

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

18z=12

z=12/18

z=2/3

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