20+8z=100

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Solution for 20+8z=100 equation: 



20+8z=100

We move all terms to the left:

20+8z-(100)=0

We add all the numbers together, and all the variables

8z-80=0

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

8z=80

z=80/8

z=10

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