(27x^7/49x)-(21x^6/243x)

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Solution for (27x^7/49x)-(21x^6/243x) equation: 


x in (-oo:+oo)

x*((27*x^7)/49)-(x*((21*x^6)/243)) = 0

x*((27*x^7)/49)+(-7/81)*x^7 = 0

27/49*x^8-7/81*x^7 = 0

x^7*(27/49*x-7/81) = 0

27/49*x-7/81 = 0 // + 7/81

27/49*x = 7/81 // : 27/49

x = 7/81/27/49

x = 343/2187

x^7 = 0

1*x^7 = 0 // : 1

x^7 = 0

x = 0

x in { 343/2187, 0 }

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