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b in (-oo:+oo)
6-((4/5)*b) = -14/5 // + -14/5
6-((4/5)*b)-(-14/5) = 0
(-4/5)*b+14/5+6 = 0
44/5-4/5*b = 0 // - 44/5
-4/5*b = -44/5 // : -4/5
b = -44/5/(-4/5)
b = 11
b = 11
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