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

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



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

We move all terms to the left:

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

We add all the numbers together, and all the variables

-3u+7-0=0

We add all the numbers together, and all the variables

-3u+7=0

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

-3u=-7

u=-7/-3

u=2+1/3

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