7+9u=-2

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Solution for 7+9u=-2 equation: 



7+9u=-2

We move all terms to the left:

7+9u-(-2)=0

We add all the numbers together, and all the variables

9u+9=0

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

9u=-9

u=-9/9

u=-1

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