19=1-9u.

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Solution for 19=1-9u. equation: 



19=1-9u.

We move all terms to the left:

19-(1-9u.)=0

We add all the numbers together, and all the variables

-(-9u.+1)+19=0

We get rid of parentheses

9u.-1+19=0

We add all the numbers together, and all the variables

9u.+18=0

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

9u.=-18

u=-18/1

u=-18

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