9x-12/21 - solution

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Solution for 9x-12/21 equation:

x in (-oo:+oo)

9*x-(12/21) = 0

9*x-4/7 = 0

9*x-4/7 = 0 // + 4/7

9*x = 4/7 // : 9

x = 4/7/9

x = 4/63

x = 4/63

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