9u-9u+u+3u-1=7

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Solution for 9u-9u+u+3u-1=7 equation: 



9u-9u+u+3u-1=7

We move all terms to the left:

9u-9u+u+3u-1-(7)=0

We add all the numbers together, and all the variables

4u-8=0

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

4u=8

u=8/4

u=2

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