12z-10z-4z=-20

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Solution for 12z-10z-4z=-20 equation: 



12z-10z-4z=-20

We move all terms to the left:

12z-10z-4z-(-20)=0

We add all the numbers together, and all the variables

-2z+20=0

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

-2z=-20

z=-20/-2

z=+10

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