3z+11z-9z-9z=20

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Solution for 3z+11z-9z-9z=20 equation: 



3z+11z-9z-9z=20

We move all terms to the left:

3z+11z-9z-9z-(20)=0

We add all the numbers together, and all the variables

-4z-20=0

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

-4z=20

z=20/-4

z=-5

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