Răspuns:
Explicație pas cu pas:
a/4= b/7=> a=4b/7
a+8= 4b/7+8= 4b/7+56/7= ( 4b+56)/7
(a+8)/ (b+14)= (4b+56)/7/(b+14)= (4b+ 56)/7 ori 1/(b+14)= (4b+56)/ 7 ori (b+14)= 4( b+14)/ 7( b+14)= 4/7
