-3u+9=-15u+9

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Solution for -3u+9=-15u+9 equation: 



-3u+9=-15u+9

We move all terms to the left:

-3u+9-(-15u+9)=0

We get rid of parentheses

-3u+15u-9+9=0

We add all the numbers together, and all the variables

12u=0

u=0/12

u=0

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