Question

Media aritmetica a 4 nr este 75 . Determinați suma lor.

Answer 1

(a+b+c+d):2=75
(a+b+c+d)=75•2
(a+b+c+d)=150
R:150

Answer 2

a+b+c+d=75 b=a+1 c=a+2 d=a+3 ------------------------------------------------------------ a+b+c+d=75 a+a+1+a+2+a+3=75 4•a+6=75 4•a=75-6 a=69:4 a=17 b=a+1 b=18 c=a+2 c=19 d=a+3 d=20