3+2u=-1

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Solution for 3+2u=-1 equation: 



3+2u=-1

We move all terms to the left:

3+2u-(-1)=0

We add all the numbers together, and all the variables

2u+4=0

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

2u=-4

u=-4/2

u=-2

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