-7/9w=21

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Solution for -7/9w=21 equation: 


w in (-oo:+oo)

(-7/9)*w = 21 // - 21

(-7/9)*w-21 = 0

-7/9*w-21 = 0 // + 21

-7/9*w = 21 // : -7/9

w = 21/(-7/9)

w = -27

w = -27

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