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2014-08-19T17:18:40+03:00
Notam Suma=S
S-S*1/4=A
A-A*1/6=B
B-B*1/3=C
C-120=600  => C=720

⇒B-B*1/3=B*3/3-B*1/3=B*2/3=720
B=720*3:2=1080

A-A*1/6=A*6/6-A*1/6=A*5/6=1080
A=1080*6:5=1296

S-S*1/4=S*4/4-S*1/4=S*3/4=1296
S=1296*4:3=1728

Raspuns:Suma pe care o avea elevul este 1728 lei.

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