Răspunsuri

  • Utilizator Brainly
2014-09-27T19:53:00+03:00
A+b+c=840
a+b=642
b+c=553

642+c=840
c=840-642
c=198

a+553=840
a=840-553
a=287

287+b=642
b=642-287
b=355

Verificare : 287+355+198=840
2014-09-27T20:34:00+03:00