20z+2z-21z=4

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Solution for 20z+2z-21z=4 equation: 



20z+2z-21z=4

We move all terms to the left:

20z+2z-21z-(4)=0

We add all the numbers together, and all the variables

z-4=0

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

z=4

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