x+1/6x=21 - solution

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Solution for x+1/6x=21 equation:

x in (-oo:+oo)

x+(1/6)*x = 21 // - 21

x+(1/6)*x-21 = 0

7/6*x-21 = 0 // + 21

7/6*x = 21 // : 7/6

x = 21/7/6

x = 18

x = 18

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