8-7u=-20

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Solution for 8-7u=-20 equation: 



8-7u=-20

We move all terms to the left:

8-7u-(-20)=0

We add all the numbers together, and all the variables

-7u+28=0

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

-7u=-28

u=-28/-7

u=+4

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