Răspuns :
a+b+c=980
a+b=475
b+c=560
980-475=505( kg in a treia zi)
560-505=55( kg in a doua zi)
475-55=420( kg in prima zi)
proba:505+55+420=980kg
a+b=475
b+c=560
980-475=505( kg in a treia zi)
560-505=55( kg in a doua zi)
475-55=420( kg in prima zi)
proba:505+55+420=980kg
a+b+c=980
a+b=475
b+c=560
c=980-475=505 a treia zi
a=980-560=420 prima zi
c+a=925
b=980-925=55 a doua zi
a+b=475
b+c=560
c=980-475=505 a treia zi
a=980-560=420 prima zi
c+a=925
b=980-925=55 a doua zi