5z+z+z=28

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Solution for 5z+z+z=28 equation: 



5z+z+z=28

We move all terms to the left:

5z+z+z-(28)=0

We add all the numbers together, and all the variables

7z-28=0

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

7z=28

z=28/7

z=4

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