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x in (-oo:+oo)
2*x = (-3.14/4)/2 // - (-3.14/4)/2
2*x-((-3.14/4)/2) = 0
2*x+0.3925 = 0
2*x+0.3925 = 0 // - 0.3925
2*x = -0.3925 // : 2
x = -0.3925/2
x = -0.19625
x = -0.19625
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