Question

in 3canistre aunt 60l motorina Cati litri de motorina aunt in decade canistra daca primele doua la un loc sunt 40l air ultimele doua sunt 30l

Answer 1

a+b+c=60
a+b=40
b+c=30
40+c=60
c=60-40
c=20
b+20=30
b=30-20
b=10
a+10=40
a=40-10
a=30
30+10+20=60