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pv=pc₊g
150=pc₊25%pc
150=125%pc
15000=125pc
120=pc
⇒G=150-120=30
--------------------------
2 libro(se pierde)
pv=pc-p
150=pc-25%pc
150=75%pc
15000=75pc
200=pc
⇒P=200-150=50
Perdida >Ganancia
⇒Pierde=50-30=20
Rpta: Pierde 20 soles