21+1/10u=30

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Solution for 21+1/10u=30 equation: 



21+1/10u=30

We move all terms to the left:

21+1/10u-(30)=0



Domain of the equation: 10u!=0

u!=0/10

u!=0

u∈R



We add all the numbers together, and all the variables

1/10u-9=0

We multiply all the terms by the denominator


-9*10u+1=0

Wy multiply elements

-90u+1=0

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

-90u=-1

u=-1/-90

u=1/90

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