3u-9=(-3)

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Solution for 3u-9=(-3) equation: 



3u-9=(-3)

We move all terms to the left:

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

We add all the numbers together, and all the variables

3u-6=0

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

3u=6

u=6/3

u=2

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