3=-5+u

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Solution for 3=-5+u equation: 



3=-5+u

We move all terms to the left:

3-(-5+u)=0

We add all the numbers together, and all the variables

-(u-5)+3=0

We get rid of parentheses

-u+5+3=0

We add all the numbers together, and all the variables

-1u+8=0

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

-u=-8

u=-8/-1

u=+8

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