Răspunsuri

2014-10-30T09:18:28+02:00
X=y+12    S=x+y =y+12+y =2y+12    D =x-y =y+12-y = 12
S=D·7+6
2(y+6) =12·7+6     ]÷2 ⇒ y+6 = 42 +3 ⇒ y= 39  x=51