18+20u=-13-11u

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Solution for 18+20u=-13-11u equation: 



18+20u=-13-11u

We move all terms to the left:

18+20u-(-13-11u)=0

We add all the numbers together, and all the variables

20u-(-11u-13)+18=0

We get rid of parentheses

20u+11u+13+18=0

We add all the numbers together, and all the variables

31u+31=0

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

31u=-31

u=-31/31

u=-1

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