8u+20=84

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Solution for 8u+20=84 equation: 



8u+20=84

We move all terms to the left:

8u+20-(84)=0

We add all the numbers together, and all the variables

8u-64=0

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

8u=64

u=64/8

u=8

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