3x/9-21

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Solution for 3x/9-21 equation: 


x in (-oo:+oo)

(3*x)/9-21 = 0

1/3*x-21 = 0 // + 21

1/3*x = 21 // : 1/3

x = 21/1/3

x = 63

x = 63

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