6u=3u-9

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Solution for 6u=3u-9 equation: 



6u=3u-9

We move all terms to the left:

6u-(3u-9)=0

We get rid of parentheses

6u-3u+9=0

We add all the numbers together, and all the variables

3u+9=0

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

3u=-9

u=-9/3

u=-3

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