(480-x)x/480=120

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Solution for (480-x)x/480=120 equation: 


x in (-oo:+oo)

(x*(480-x))/480 = 120 // - 120

(x*(480-x))/480-120 = 0

(x*(480-x))/480+(-120*480)/480 = 0

x*(480-x)-120*480 = 0

480*x-x^2-57600 = 0

480*x-x^2-57600 = 0

480*x-x^2-57600 = 0

DELTA = 480^2-(-57600*(-1)*4)

DELTA = 0

x = -480/(-1*2)

x = 240 or x = 240

(x-240)^2 = 0

((x-240)^2)/480 = 0

((x-240)^2)/480 = 0 // * 480

(x-240)^2 = 0

x-240 = 0 // + 240

x = 240

x in { 240, 240 }

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