Răspunsuri

2014-11-11T15:35:36+02:00
A+B+C+=349
A=4B+4
B=7C+4

A=4(7C+4)+4
A=28C+16+4
A=28C+20

28C+20+7C+4+C=349
36C=349-20-4
36C=325
 
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