21z-3=12

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Solution for 21z-3=12 equation: 



21z-3=12

We move all terms to the left:

21z-3-(12)=0

We add all the numbers together, and all the variables

21z-15=0

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

21z=15

z=15/21

z=5/7

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