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B in (-oo:+oo)
64292.625 = 78.4*(1/3)*B // - 78.4*(1/3)*B
64292.625-(78.4*(1/3)*B) = 0
64292.625-26.13333333*B = 0
64292.625-26.13333333*B = 0 // - 64292.625
-26.13333333*B = -64292.625 // : -26.13333333
B = -64292.625/(-26.13333333)
B = 2460.17697735
B = 2460.17697735
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