8u-u+u-3u+3u=8

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



8u-u+u-3u+3u=8

We move all terms to the left:

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

We add all the numbers together, and all the variables

8u-8=0

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

8u=8

u=8/8

u=1

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