-9=-3+u/2

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Solution for -9=-3+u/2 equation: 



-9=-3+u/2

We move all terms to the left:

-9-(-3+u/2)=0

We add all the numbers together, and all the variables

-(u/2-3)-9=0

We get rid of parentheses

-u/2+3-9=0

We multiply all the terms by the denominator


-u+3*2-9*2=0

We add all the numbers together, and all the variables

-1u-12=0

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

-u=12

u=12/-1

u=-12

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