-21=7/9x

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Solution for -21=7/9x equation: 


x in (-oo:+oo)

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

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

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

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

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

x = 21/(-7/9)

x = -27

x = -27

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