Răspunsuri

2014-10-14T20:17:19+03:00

x-120<=215, x<=120+215, x<=335, x=1,2, 3,...............335

250-x<=40, 250-40>=x, x<=210, x=1,2,3,.........210

x+40>=320, x>=320-40, x>=280, x=280, 281, 282............................