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b in (-oo:+oo)
3068.332 = 20.1*(1/3)*b // - 20.1*(1/3)*b
3068.332-(20.1*(1/3)*b) = 0
3068.332-6.7*b = 0
3068.332-6.7*b = 0 // - 3068.332
-6.7*b = -3068.332 // : -6.7
b = -3068.332/(-6.7)
b = 457.96
b = 457.96
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