Question

DAU COROANA!!!!!
Media aritmetica a trei numere este
a+ b + c = 21,7
c=a:2
(b-c):4,2= 2,5

Answer 1

C=a:2=》a=2c (b-c)=2,5 × 4,2 (b-c)=10,5 a+b+c=21,7=》a=21,7 - b-c=》a=21.7-10.5=》a=11.2 c=11.2:2=》c= 5.6 11.2+5.6+b=21,7=》b= 4.9