55=117-2u

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Solution for 55=117-2u equation: 



55=117-2u

We move all terms to the left:

55-(117-2u)=0

We add all the numbers together, and all the variables

-(-2u+117)+55=0

We get rid of parentheses

2u-117+55=0

We add all the numbers together, and all the variables

2u-62=0

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

2u=62

u=62/2

u=31

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