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x in (-oo:+oo)
x/12 = sin(pi/3) // - sin(pi/3)
x/12-sin(pi/3) = 0
1/12*x-((3^(1/2))/2) = 0 // + (3^(1/2))/2
1/12*x = (3^(1/2))/2 // : 1/12
x = ((3^(1/2))/2)/1/12
x = 6*3^(1/2)
x = 6*3^(1/2)
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