3x/4x=5x/15

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Solution for 3x/4x=5x/15 equation: 


x in (-oo:+oo)

((3*x)/4)*x = (5*x)/15 // - (5*x)/15

((3*x)/4)*x-((5*x)/15) = 0

((3*x)/4)*x+(-1/3)*x = 0

3/4*x^2-1/3*x = 0

DELTA = (-1/3)^2-(0*3/4*4)

DELTA = 1/9

DELTA > 0

x = ((1/9)^(1/2)+1/3)/(3/4*2) or x = (1/3-(1/9)^(1/2))/(3/4*2)

x = 4/9 or x = 0

x in { 0, 4/9 }

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