117.2=(r*r)/3*7

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Solution for 117.2=(r*r)/3*7 equation: 


r in (-oo:+oo)

117.2 = 7*((r*r)/3) // - 7*((r*r)/3)

117.2-(7*((r*r)/3)) = 0

(-7/3)*r^2+117.2 = 0

-7/3*r^2 = -117.2 // : -7/3

r^2 = 50.2285715

r^2 = 50.2285715 // ^ 1/2

abs(r) = 50.2285715^(1/2)

r = 50.2285715^(1/2) or r = -50.2285715^(1/2)

r in { 50.2285715^(1/2), -50.2285715^(1/2) }

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