6+3u=-7

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Solution for 6+3u=-7 equation: 



6+3u=-7

We move all terms to the left:

6+3u-(-7)=0

We add all the numbers together, and all the variables

3u+13=0

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

3u=-13

u=-13/3

u=-4+1/3

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