Răspuns:
notqm cu x numărul de pagini
I: 1/3 • x ; r = x - x/3 = 2x/3
II: 1/4 • 2x/3 = 2x/12 = x/6; r= x - 5x/6 =x/6
III: 4/6 • x/6 = 4x/36 = x/9
IV: 16
2x/3 +x/6 + x/9 +16 = x
12x /18 + 3x/18 + 2x/18 + 288 = 18x /18 | •18
12x+3x+2x + 288= 18x
18x -12x-3x-2x =288
x = 288 de pagini are cartea
