-9u-2+7u=-u-20

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Solution for -9u-2+7u=-u-20 equation: 



-9u-2+7u=-u-20

We move all terms to the left:

-9u-2+7u-(-u-20)=0

We add all the numbers together, and all the variables

-9u+7u-(-1u-20)-2=0

We add all the numbers together, and all the variables

-2u-(-1u-20)-2=0

We get rid of parentheses

-2u+1u+20-2=0

We add all the numbers together, and all the variables

-1u+18=0

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

-u=-18

u=-18/-1

u=+18

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