-21=-7/5w

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Solution for -21=-7/5w equation: 



-21=-7/5w

We move all terms to the left:

-21-(-7/5w)=0



Domain of the equation: 5w)!=0

w!=0/1

w!=0

w∈R



We get rid of parentheses

7/5w-21=0

We multiply all the terms by the denominator


-21*5w+7=0

Wy multiply elements

-105w+7=0

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

-105w=-7

w=-7/-105

w=1/15

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