9+2u=-3

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Solution for 9+2u=-3 equation: 



9+2u=-3

We move all terms to the left:

9+2u-(-3)=0

We add all the numbers together, and all the variables

2u+12=0

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

2u=-12

u=-12/2

u=-6

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