👤

Help.. :D 
           Exercitiile care sunt incercuite.



Help D Exercitiile Care Sunt Incercuite class=

Răspuns :

25.
 (a+b+c)/3=5,(3)
(a+₃2/5+7,1)/3=5,(3)
5,(3)= ₅3/9= (5*9 +3)/9= 48/9= 16/3
₃2/5=(3*5+2)/5= 17/5
7,1=71/10
(a+17/5+71/10)/3= [(10a+34+71)/10]/3=16/3
(10a+ 105)/10= 16
10a+105=160
10a=55
a=55/10=11/2