5 nuci............2 covrigi............285 grame |•4
2 nuci.............4 covrigi.............370 grame|•2
un covrig?
o nuca?
100 nuci........10 covrigi............?
=====================================
20 nuci.................8 covrigi.................1140 grame
4 nuci....................8 covrigi.................740 grame
-------(-)
16 nuci....../...........400 grame
1 nuca= 400:16=25 grame
====================================
2•25+4 covrigi=370 grame
4 covrigi= 370-50=320 grame
1 covrig= 320:4=80 grame
V: 5•25+2•80=285 grame
