Răspuns :
a+b=1240
b-24=3a
b=3a+24
3a+24+a=1240
4a=1240-24
4a=1216
a=304
b=3*304+24
b=912+24
b=936
b-24=3a
b=3a+24
3a+24+a=1240
4a=1240-24
4a=1216
a=304
b=3*304+24
b=912+24
b=936
Notam cele doua numere cu literele a si b.
a+b=1240
b=3a+24
a+3a+24=1240
4a=1240-24=1216
a=1216/4=304
b=3a+24=3*304+24=936
Verificare:a+b=304+936=1240