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b in (-oo:+oo)
-3*b-8 = 2*b-58 // - 2*b-58
58-3*b-(2*b)-8 = 0
58-3*b-2*b-8 = 0
50-5*b = 0 // - 50
-5*b = -50 // : -5
b = -50/(-5)
b = 10
b = 10
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