4u+u=45

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Solution for 4u+u=45 equation: 



4u+u=45

We move all terms to the left:

4u+u-(45)=0

We add all the numbers together, and all the variables

5u-45=0

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

5u=45

u=45/5

u=9

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