Question

Media aritmetică a nr x si 4/5este 3/4

Answer 1

(X+4/5):2=3/4 X+4/5=2×3/4 X+4/5=3/2 X=3/2-4/5(pe prima o amplifici cu 5 si pe a doua cu 2) X=15/10-8/10 X=7/10

Answer 2

(x+4/5) : 2= 3/4
(x+4/5) = 3/4*2
x+4/5=3/2
x= 3/2-4/5
10x=15-8
10x=7
x= 7/10
x=0,7