4u=15-u

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Solution for 4u=15-u equation: 



4u=15-u

We move all terms to the left:

4u-(15-u)=0

We add all the numbers together, and all the variables

4u-(-1u+15)=0

We get rid of parentheses

4u+1u-15=0

We add all the numbers together, and all the variables

5u-15=0

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

5u=15

u=15/5

u=3

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