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X in (-oo:+oo)
3*X+3.14/2 = 2*3.14 // - 2*3.14
3*X+3.14/2-(2*3.14) = 0
3*X+3.14/2-6.28 = 0
3*X-4.71 = 0 // + 4.71
3*X = 4.71 // : 3
X = 4.71/3
X = 1.57
X = 1.57
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