18-15u=-20-13u

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Solution for 18-15u=-20-13u equation: 



18-15u=-20-13u

We move all terms to the left:

18-15u-(-20-13u)=0

We add all the numbers together, and all the variables

-15u-(-13u-20)+18=0

We get rid of parentheses

-15u+13u+20+18=0

We add all the numbers together, and all the variables

-2u+38=0

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

-2u=-38

u=-38/-2

u=+19

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