6z+7z=78

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Solution for 6z+7z=78 equation: 



6z+7z=78

We move all terms to the left:

6z+7z-(78)=0

We add all the numbers together, and all the variables

13z-78=0

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

13z=78

z=78/13

z=6

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