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proplema 7 va multumaesc

Proplema 7 Va Multumaesc class=

Răspuns :

x=lungime drum
x/5+5 =ziua 1
x-(x/5+5 )=4x/5-5=rest
(4x/5-5)×2/3-10=8x/15-10/3-10=8x/15-40/3=ziua 2
x/5+5+8x/15-40/3+35=x
3x+75+8x-200+525=15x
11x+400=15x
4x=400
x=100 km