180-4x/7x

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Solution for 180-4x/7x equation: 


x in (-oo:+oo)

180-(((4*x)/7)*x) = 0

(-4/7)*x^2+180 = 0

-4/7*x^2 = -180 // : -4/7

x^2 = 315

x^2 = 315 // ^ 1/2

abs(x) = 3*35^(1/2)

x = 3*35^(1/2) or x = -(3*35^(1/2))

x in { 3*35^(1/2), -(3*35^(1/2)) }

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