13u=15u+20

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Solution for 13u=15u+20 equation: 



13u=15u+20

We move all terms to the left:

13u-(15u+20)=0

We get rid of parentheses

13u-15u-20=0

We add all the numbers together, and all the variables

-2u-20=0

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

-2u=20

u=20/-2

u=-10

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