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b in (-oo:+oo)
6*(1-6*b) = 222 // - 222
6*(1-6*b)-222 = 0
6*(1-6*b)-222 = 0
-36*b-216 = 0
-36*b-216 = 0
-36*b-216 = 0 // + 216
-36*b = 216 // : -36
b = 216/(-36)
b = -6
b = -6
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