w-1-3w=-21

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Solution for w-1-3w=-21 equation: 


w in (-oo:+oo)

w-(3*w)-1 = -21 // + 21

w-(3*w)-1+21 = 0

w-3*w-1+21 = 0

20-2*w = 0 // - 20

-2*w = -20 // : -2

w = -20/(-2)

w = 10

w = 10

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