Question

dau coroana ex 12 va rog

Answer 1

le voi rezolva pe rand si apoi le voi inlocui in egalitate
0,(3)=3/9=1/3
0,(27)=27/99=3/11
1,(23)=(123-1)/99=122/99
4,5:0,09=50
1/(1+1/2)=1/(3/2)=2/3

(x+1)/x =( 1/3+3/11+122/99)/(50+2+2/3)  × 2607
(x+1)/x =( 33+27+122/99)/(52+2/3)  × 2607
(x+1)/x =(182/99)/(158/3)  × 2607
(x+1)/x =182/99 ×3/158  × 2607
(x+1)/x =91/33 ×1/79  × 2607
2607=33×79
1+1/x =91
1/x =90
x=1/90