21(3.14)=1/3(3.14)(x)(7)

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Solution for 21(3.14)=1/3(3.14)(x)(7) equation: 


x in (-oo:+oo)

3.14*21 = 3.14*7*(1/3)*x // - 3.14*7*(1/3)*x

3.14*21-(3.14*7*(1/3)*x) = 0

3.14*21-7.32666667*x = 0

65.94-7.32666667*x = 0 // - 65.94

-7.32666667*x = -65.94 // : -7.32666667

x = -65.94/(-7.32666667)

x = 9

x = 9

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