-7=2-3u

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Solution for -7=2-3u equation: 



-7=2-3u

We move all terms to the left:

-7-(2-3u)=0

We add all the numbers together, and all the variables

-(-3u+2)-7=0

We get rid of parentheses

3u-2-7=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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