-20-u=20+3u

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Solution for -20-u=20+3u equation: 



-20-u=20+3u

We move all terms to the left:

-20-u-(20+3u)=0

We add all the numbers together, and all the variables

-u-(3u+20)-20=0

We add all the numbers together, and all the variables

-1u-(3u+20)-20=0

We get rid of parentheses

-1u-3u-20-20=0

We add all the numbers together, and all the variables

-4u-40=0

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

-4u=40

u=40/-4

u=-10

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