13u+u-13u=4

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Solution for 13u+u-13u=4 equation: 



13u+u-13u=4

We move all terms to the left:

13u+u-13u-(4)=0

We add all the numbers together, and all the variables

u-4=0

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

u=4

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