a+b+c/3=42,6
a+b+c=127.8
a=24.2
b+c=127.8-24.2
b+c=103.6
ma=b+c/2
ma=103.6/2
ma=51.8
======================
2a=18.5-2.5
2a=16
a=8
=====================
a+a/2+a/4=5.6 numitor comun 4
4a+2a+a=22.4
7a=22.4
a=3.2
========================
a+a/5=17.28 Numitor comun 5
5a+a=86.4
6a=86.4
a=21.6
============================
a+b=40.6 => a=40.6-b
b+c=60.8 => c=60.8-b
a+c=52.6
40.6-b+60.8-b=52.5
101.4-2b=52.5
101.4-52.5=2b
48.9=2b
b=24.45
a=40.6-24.45=16.15
c=60.8-24.45=36.35