Răspuns :
a+b+c=602
a=3x7=21
b=21+139=160
a+b=21+160=181
c=602-181=421
a+b+c=21+160+421=602
a=3x7=21
b=21+139=160
a+b=21+160=181
c=602-181=421
a+b+c=21+160+421=602
7x3=21 primul numar
139+21=160 al doilea numar
602-21-160 = 421 al treilea numar
139+21=160 al doilea numar
602-21-160 = 421 al treilea numar