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b in (-oo:+oo)
(2*b-3.4)/0.6 = -29 // + 29
(2*b-3.4)/0.6+29 = 0
(2*b-3.4)/0.6+(0.6*29)/0.6 = 0
2*b+0.6*29-3.4 = 0
2*b+14 = 0
(2*b+14)/0.6 = 0
(2*b+14)/0.6 = 0 // * 0.6
2*b+14 = 0
2*b+14 = 0 // - 14
2*b = -14 // : 2
b = -14/2
b = -7
b = -7
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