Răspunsuri

2014-06-02T22:22:37+03:00
Sub. II ex. 2

d+r+e=117
r=3d
e=r+d+21 => e=4d+21

d+3d+4d+21=117
8d=96
d=12 lei

r=3d => r=36 lei

e=4d+21=4*12+21=48+21=69 lei

verificare: 12+36+69=117 


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