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43*x-(((3*x)/6)*x) = 2*x // - 2*x
43*x-(((3*x)/6)*x)-(2*x) = 0
(-1/2)*x^2+43*x-2*x = 0
41*x-1/2*x^2 = 0
DELTA = 41^2-(-1/2*0*4)
DELTA = 1681
DELTA > 0
x = (1681^(1/2)-41)/(-1/2*2) or x = (-1681^(1/2)-41)/(-1/2*2)
x = 0 or x = 82
x in { 0, 82 }
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