51=2-7u

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Solution for 51=2-7u equation: 



51=2-7u

We move all terms to the left:

51-(2-7u)=0

We add all the numbers together, and all the variables

-(-7u+2)+51=0

We get rid of parentheses

7u-2+51=0

We add all the numbers together, and all the variables

7u+49=0

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

7u=-49

u=-49/7

u=-7

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