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[tex]x\rightarrow\text{szukana liczba}\\\\\frac{1}{3}x+\frac{1}{5}x=\frac{5}{15}x+\frac{3}{15}x=\frac{8}{15}x\\\\x+\frac{8}{15}x=92\\\\1\frac{8}{15}x=92\\\\\frac{23}{15}x=92\\\\x=92:\frac{23}{15}=92\cdot\frac{15}{23}=4\cdot15\\\\\huge\boxed{x=60}[/tex]
