45=(21/3x)(x)

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Solution for 45=(21/3x)(x) equation: 


x in (-oo:+oo)

45 = (21/3)*x*x // - (21/3)*x*x

45-((21/3)*x*x) = 0

45-7*x^2 = 0

-7*x^2 = -45 // : -7

x^2 = 45/7

x^2 = 45/7 // ^ 1/2

abs(x) = (45/7)^(1/2)

x = (45/7)^(1/2) or x = -(45/7)^(1/2)

x in { (45/7)^(1/2), -(45/7)^(1/2) }

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