Răspuns :
a+b=857
a-b=343 => a=343+b
Inlocuim:
a+b=857
343+b+b=857
2b=857-343
b=514:2
b=257
=> a=257+343=600
a-b=343 => a=343+b
Inlocuim:
a+b=857
343+b+b=857
2b=857-343
b=514:2
b=257
=> a=257+343=600
a+b=857
a=b+343
b+b+343=857
2b=857-343
2b=514
b=514:2
b=257
a=257+343
a=600
a=b+343
b+b+343=857
2b=857-343
2b=514
b=514:2
b=257
a=257+343
a=600