20-13u=-20-18u

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



20-13u=-20-18u

We move all terms to the left:

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

We add all the numbers together, and all the variables

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

We get rid of parentheses

-13u+18u+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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