3u-3=9

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Solution for 3u-3=9 equation: 



3u-3=9

We move all terms to the left:

3u-3-(9)=0

We add all the numbers together, and all the variables

3u-12=0

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

3u=12

u=12/3

u=4

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