-12u-20=13-15u

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Solution for -12u-20=13-15u equation: 



-12u-20=13-15u

We move all terms to the left:

-12u-20-(13-15u)=0

We add all the numbers together, and all the variables

-12u-(-15u+13)-20=0

We get rid of parentheses

-12u+15u-13-20=0

We add all the numbers together, and all the variables

3u-33=0

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

3u=33

u=33/3

u=11

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