-2u+-1=-15

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Solution for -2u+-1=-15 equation: 



-2u+-1=-15

We move all terms to the left:

-2u+-1-(-15)=0

We add all the numbers together, and all the variables

-2u+14=0

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

-2u=-14

u=-14/-2

u=+7

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