20+9u=13u

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Solution for 20+9u=13u equation: 



20+9u=13u

We move all terms to the left:

20+9u-(13u)=0

We add all the numbers together, and all the variables

-4u+20=0

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

-4u=-20

u=-20/-4

u=+5

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