69=3u+9

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Solution for 69=3u+9 equation: 



69=3u+9

We move all terms to the left:

69-(3u+9)=0

We get rid of parentheses

-3u-9+69=0

We add all the numbers together, and all the variables

-3u+60=0

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

-3u=-60

u=-60/-3

u=+20

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