Răspunsuri

2014-05-12T12:40:09+03:00
380=c+r, c-bani cheltuiti, r- bani ramasi
r=c-40
380=c+c-40
420=2c, c=210 lei a avut mama
r=210-40=170 bani ramasi
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2014-05-12T12:50:03+03:00
380+40=420 lei (ce a cheltuit + ce a ramas)      420:2=210 lei (a avut)    210 -40=170 lei (raman)