20=-20-6u

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Solution for 20=-20-6u equation: 



20=-20-6u

We move all terms to the left:

20-(-20-6u)=0

We add all the numbers together, and all the variables

-(-6u-20)+20=0

We get rid of parentheses

6u+20+20=0

We add all the numbers together, and all the variables

6u+40=0

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

6u=-40

u=-40/6

u=-6+2/3

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