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b in (-oo:+oo)
7*b = 14/3 // - 14/3
7*b-(14/3) = 0
7*b-14/3 = 0
7*b-14/3 = 0 // + 14/3
7*b = 14/3 // : 7
b = 14/3/7
b = 2/3
b = 2/3
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