13u-6u=63

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Solution for 13u-6u=63 equation: 



13u-6u=63

We move all terms to the left:

13u-6u-(63)=0

We add all the numbers together, and all the variables

7u-63=0

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

7u=63

u=63/7

u=9

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