Răspuns :
1)20x/100 =x/5 ; x-x/5 =5x/5-x/5 =4x/5 rest
2) 30x/100*4x/5 =120x/500 =6x/25
3) 560 km
x/5+6x/25 +560 =x numitor 25
5x+6x+14000 =25x
25x-5x-6x =14000
14x =14000
x =1000 km
2) 30x/100*4x/5 =120x/500 =6x/25
3) 560 km
x/5+6x/25 +560 =x numitor 25
5x+6x+14000 =25x
25x-5x-6x =14000
14x =14000
x =1000 km
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