Răspunsuri

2014-05-07T18:44:48+03:00
B= 4a + 2
a +4a+ 2= 67
5a= 67-2
5a= 65
a=65/5= 13=> b= 13*4 +2= 54
c= 13*2= 26
( 26 + 54 )/2= 80/2= 40
d-c= 40-26 = 14 => d.alt raspuns