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b in (-oo:+oo)
4*(6-(3*b)) = -24 // + 24
4*(6-(3*b))+24 = 0
4*(6-3*b)+24 = 0
4*(6-3*b)+24 = 0
48-12*b = 0
48-12*b = 0
48-12*b = 0 // - 48
-12*b = -48 // : -12
b = -48/(-12)
b = 4
b = 4
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