a= caiete dictando
1) luni
1/4 din a = 1/4 xa = a/4
2) marti
a-a/4 = (4a-a) /4= 3a/4 ( ramase)
3/6 din 3a/4= 3/6 x 3a/4= 3a/ 8( marti)
3) miercuri
3a/4 - 3a/8= 6a/8 - 3a/8= 3a/8(rest)
2/3 din 3a/8= 2/3 x 3a/8= a/4(miercuri)
4) joi
3a/8 - a/4= 3a/8 - 2a/8=a/8 (rest)
a/8 :2 = a/8 x1/2= a/16(joi)
a= a/4 + 3a/8 + a/4 + a/16 + 61
aducem la acelasi numitor
16a = 4a + 6a+ 4a+a+976
16a = 15a+976
16a-15a = 976
a=976( caiete dictando in librarie)
luni: a/4= 976/4=244 (caiete)
marti : 3a/8= (3x976)/8= 366(caiete)
miercuri: a/4= 976/4=244(caiete)
joi: a/16= 976/16=61(caiete)
vineri: 61
V : 244+ 366+244+61+61=976(total)