Răspuns :
a doua zi: 126-27=99
a treia zi: 126+99=225
in cele trei zile: 126+99+225=450km
a treia zi: 126+99=225
in cele trei zile: 126+99+225=450km
126+(126-27)+(126+126-27)=
126+99+126+99=450km a parcurs in trei zile
126+99+126+99=450km a parcurs in trei zile