-2u+1=9

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Solution for -2u+1=9 equation: 



-2u+1=9

We move all terms to the left:

-2u+1-(9)=0

We add all the numbers together, and all the variables

-2u-8=0

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

-2u=8

u=8/-2

u=-4

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