51=-3z-12

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Solution for 51=-3z-12 equation: 



51=-3z-12

We move all terms to the left:

51-(-3z-12)=0

We get rid of parentheses

3z+12+51=0

We add all the numbers together, and all the variables

3z+63=0

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

3z=-63

z=-63/3

z=-21

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