-7/3x=21

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Solution for -7/3x=21 equation: 


x in (-oo:+oo)

(-7/3)*x = 21 // - 21

(-7/3)*x-21 = 0

-7/3*x-21 = 0 // + 21

-7/3*x = 21 // : -7/3

x = 21/(-7/3)

x = -9

x = -9

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