3-9u=-8u

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Solution for 3-9u=-8u equation: 



3-9u=-8u

We move all terms to the left:

3-9u-(-8u)=0

We get rid of parentheses

-9u+8u+3=0

We add all the numbers together, and all the variables

-1u+3=0

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

-u=-3

u=-3/-1

u=+3

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