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b in (-oo:+oo)
6*b+3/4 = -237/4 // + -237/4
6*b+3/4-(-237/4) = 0
6*b+3/4+237/4 = 0
6*b+60 = 0 // - 60
6*b = -60 // : 6
b = -60/6
b = -10
b = -10
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