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b in (-oo:+oo)
-4*b-(1/5) = 7*b+593/60 // - 7*b+593/60
-4*b-(7*b)-(1/5)-(593/60) = 0
-4*b-7*b-1/5-593/60 = 0
-11*b-121/12 = 0 // + 121/12
-11*b = 121/12 // : -11
b = 121/12/(-11)
b = -11/12
b = -11/12
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