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B/13-((9*b)/13) = 32/13 // - 32/13
B/13-((9*b)/13)-(32/13) = 0
B/13+(-9/13)*b-32/13 = 0
1/13*B-9/13*b-32/13 = 0
x należy do R
x in (-oo:+oo)
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