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x in (-oo:+oo)
30.56/4.56 = x/5.7 // - x/5.7
30.56/4.56-(x/5.7) = 0
30.56/4.56-0.1754386*x = 0
6.70175439-0.1754386*x = 0 // - 6.70175439
-0.1754386*x = -6.70175439 // : -0.1754386
x = -6.70175439/(-0.1754386)
x = 38.19999926
x = 38.19999926
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