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((10*x)/5)*x-(3*x) = 0
((10*x)/5)*x-3*x = 0
2*x^2-3*x = 0
DELTA = (-3)^2-(0*2*4)
DELTA = 9
DELTA > 0
x = (9^(1/2)+3)/(2*2) or x = (3-9^(1/2))/(2*2)
x = 3/2 or x = 0
x in { 0, 3/2 }
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