Răspuns :
1400-1246=154 dorina
1370-154=1216 mihai
1246-1216=30 ana
154+1216+30=1400
1370-154=1216 mihai
1246-1216=30 ana
154+1216+30=1400
a=Ana b=Mihai c=Dorina
a+b+c=1.400
a+b=1.246
b+c=1.370
1.246+c=1.400
c=1.400-1.246=154
a+1.370=1.400
a=1.400-1.370=30
154+30=184(Dorina+Alina)
184+b=1.400
b=1.400-184=1.216
deci,Alina=30 Mihai=1.216 Dorina=154
a+b+c=1.400
a+b=1.246
b+c=1.370
1.246+c=1.400
c=1.400-1.246=154
a+1.370=1.400
a=1.400-1.370=30
154+30=184(Dorina+Alina)
184+b=1.400
b=1.400-184=1.216
deci,Alina=30 Mihai=1.216 Dorina=154