-3/7u=9

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Solution for -3/7u=9 equation: 



-3/7u=9

We move all terms to the left:

-3/7u-(9)=0



Domain of the equation: 7u!=0

u!=0/7

u!=0

u∈R



We multiply all the terms by the denominator


-9*7u-3=0

Wy multiply elements

-63u-3=0

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

-63u=3

u=3/-63

u=-1/21

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