Răspuns :
240 pagini.........................(5/7)
x pagini...............................(7/7)
atunci x = (240 x 7) : 5 => x = 1680 : 5 => x = 336 ( pagini are cartea )
240 pagini.........................(5/7)
x pagini...............................(7/7)
atunci x = (240 x 7) : 5 => x = 1680 : 5 => x = 336 ( pagini are cartea )