barry-wright_60ae4ae76813f
barry-wright_60ae4ae76813f
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sea el #total de libros : x libros de musica : x/3 resto : 2x/3 ciencias : 1/4(2x/3) matematicas :60 donde : libros de musica + libros de ciencia +libros de mate = #total de libros (x/3) + (1/4(2x/3) ) + 60 = x x =120 …