Răspuns :
notam cu x nr care se scade si avem 3x +12+345+126=975
3x=975-483=492,x=492:3=164
a=12+164=176,
b=345+164=509
c=126+164=290
3x=975-483=492,x=492:3=164
a=12+164=176,
b=345+164=509
c=126+164=290