Răspuns :
a+2a+a/4=612 nmc=4
(4a+8a+a)/4=612
13a/4=612
13a=612*4
a=2448/13=188,307
(4a+8a+a)/4=612
13a/4=612
13a=612*4
a=2448/13=188,307
a+2a+a/4=612
/..../..../..../..../a
/..../..../..../..../..../..../..../..../2a }612
/..../a/4
612:13=
/..../..../..../..../a
/..../..../..../..../..../..../..../..../2a }612
/..../a/4
612:13=