20+8u=13u-20

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Solution for 20+8u=13u-20 equation: 



20+8u=13u-20

We move all terms to the left:

20+8u-(13u-20)=0

We get rid of parentheses

8u-13u+20+20=0

We add all the numbers together, and all the variables

-5u+40=0

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

-5u=-40

u=-40/-5

u=+8

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