Răspuns :
a+b+c=871 kg
b=3a
b=c-10 ⇒ c=b+10 ⇒ c=3a+10
a+3a+3a+10=871
a+3a+3a=871-10
7a=861
a=123 kg in prima lada
b=3x123
b=369 kg in a doua lada
v=369+10
c=379 kg in a treia lada
123+369+379=871
b=3a
b=c-10 ⇒ c=b+10 ⇒ c=3a+10
a+3a+3a+10=871
a+3a+3a=871-10
7a=861
a=123 kg in prima lada
b=3x123
b=369 kg in a doua lada
v=369+10
c=379 kg in a treia lada
123+369+379=871