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b in (-oo:+oo)
427.734 = 16.2*(1/3)*b // - 16.2*(1/3)*b
427.734-(16.2*(1/3)*b) = 0
427.734-5.4*b = 0
427.734-5.4*b = 0 // - 427.734
-5.4*b = -427.734 // : -5.4
b = -427.734/(-5.4)
b = 79.21
b = 79.21
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