Răspuns :
a+b+c= 63 lei
a+b=43 lei
b+c=38 lei
43+c=63
c=63-43=20lei (A Ameliei)
b+c=38
b+20=38
b=38-20=18
a+b=43
a+18=43
a=43-18
a=25 lei
Verificare:
20+25+18=63 ^^
a+b=43 lei
b+c=38 lei
43+c=63
c=63-43=20lei (A Ameliei)
b+c=38
b+20=38
b=38-20=18
a+b=43
a+18=43
a=43-18
a=25 lei
Verificare:
20+25+18=63 ^^