7u=64-u

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Solution for 7u=64-u equation: 



7u=64-u

We move all terms to the left:

7u-(64-u)=0

We add all the numbers together, and all the variables

7u-(-1u+64)=0

We get rid of parentheses

7u+1u-64=0

We add all the numbers together, and all the variables

8u-64=0

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

8u=64

u=64/8

u=8

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