Z+3(z-7)=15

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Solution for Z+3(z-7)=15 equation: 



+3(Z-7)=15

We move all terms to the left:

+3(Z-7)-(15)=0

We multiply parentheses

3Z-21-15=0

We add all the numbers together, and all the variables

3Z-36=0

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

3Z=36

Z=36/3

Z=12

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