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Marco legge "Herry Potter e la pietra filosofale" in cinque giorni. Lunedì legge 118del libro, martedì il doppio, mercoledì il doppio di martedì, giovedì il doppio di mercoledì e venerdì, per finire, 48 pagine.

Quante pagine ha il libro?<1>

 

 

Per risolvere il problema indica con xil numero totale delle pagine.

Quante pagine ha letto lunedì?<2>

 

 Il martedì ha letto il doppio delle pagine quindi <3> =<4>

 

Il mercoledì il doppio di martedì quindi <5> =<6>

 

Il giovedì ancora il doppio quindi <7>

e il venerdì 48 pagine.

Quindi in totale ha letto

<8> =x

Risolvi l'equazione rispetto a xe trovi x=<9>

 

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