Răspunsuri

2014-03-17T16:37:18+02:00
(a+b)/2=14.75
a+b=29.5
8.4+b=29.5
b=29.5-8.4
b=21.1
2014-03-17T16:37:38+02:00
(8,4+b):2=14,75
c:2=14,75
c=29,5
8,4+b=29,5
b=21,1