12u=15+7u

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Solution for 12u=15+7u equation: 



12u=15+7u

We move all terms to the left:

12u-(15+7u)=0

We add all the numbers together, and all the variables

12u-(7u+15)=0

We get rid of parentheses

12u-7u-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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