21/w=-3

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Solution for 21/w=-3 equation: 



21/w=-3

We move all terms to the left:

21/w-(-3)=0



Domain of the equation: w!=0

w∈R



We add all the numbers together, and all the variables

21/w+3=0

We multiply all the terms by the denominator


3*w+21=0

We add all the numbers together, and all the variables

3w+21=0

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

3w=-21

w=-21/3

w=-7

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