Răspuns :
a+b=c=800
b+c=564
deci a+564=800
a=800-564
a=236
b=236-87
b=149
c=564-149
c=415
b+c=564
deci a+564=800
a=800-564
a=236
b=236-87
b=149
c=564-149
c=415
a+b=c=800 ; b+c=564 ;a+564=800 ; a=800-564=236 ,b=236-87=149 ,c=564-149=415 si facem Verificarea: 236+149+415=800