0=7u+2u

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Solution for 0=7u+2u equation: 



0=7u+2u

We move all terms to the left:

0-(7u+2u)=0

We add all the numbers together, and all the variables

-(+9u)+0=0

We add all the numbers together, and all the variables

-(+9u)=0

We get rid of parentheses

-9u=0

u=0/-9

u=0

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