7u+7=77

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Solution for 7u+7=77 equation: 



7u+7=77

We move all terms to the left:

7u+7-(77)=0

We add all the numbers together, and all the variables

7u-70=0

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

7u=70

u=70/7

u=10

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