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b in (-oo:+oo)
3 = ((1^1)/2)*b // - ((1^1)/2)*b
3-(((1^1)/2)*b) = 0
(-1/2)*b+3 = 0
3-1/2*b = 0 // - 3
-1/2*b = -3 // : -1/2
b = -3/(-1/2)
b = 6
b = 6
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