13u=45+4u

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Solution for 13u=45+4u equation: 



13u=45+4u

We move all terms to the left:

13u-(45+4u)=0

We add all the numbers together, and all the variables

13u-(4u+45)=0

We get rid of parentheses

13u-4u-45=0

We add all the numbers together, and all the variables

9u-45=0

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

9u=45

u=45/9

u=5

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