-u+10+1=-9-3u

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Solution for -u+10+1=-9-3u equation: 



-u+10+1=-9-3u

We move all terms to the left:

-u+10+1-(-9-3u)=0

We add all the numbers together, and all the variables

-u-(-3u-9)+10+1=0

We add all the numbers together, and all the variables

-1u-(-3u-9)+11=0

We get rid of parentheses

-1u+3u+9+11=0

We add all the numbers together, and all the variables

2u+20=0

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

2u=-20

u=-20/2

u=-10

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