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b in (-oo:+oo)
6.8/0.2 = b/3.4 // - b/3.4
6.8/0.2-(b/3.4) = 0
6.8/0.2-0.29411765*b = 0
34-0.29411765*b = 0 // - 34
-0.29411765*b = -34 // : -0.29411765
b = -34/(-0.29411765)
b = 115.59999884
b = 115.59999884
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