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b in (-oo:+oo)
-(6*b)-7 = -37 // + 37
37-(6*b)-7 = 0
37-6*b-7 = 0
30-6*b = 0 // - 30
-6*b = -30 // : -6
b = -30/(-6)
b = 5
b = 5
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