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Sebisebastian7
a fost răspuns

un automobil a parcurs o distanta astfel:in prima zi a parcurs 35%din drum,a doua zi 20% din rest,iar a treia zi restu de 624 km.aflati distanta totala.

Răspuns :

Renatemambouko
x=distanta
35%x=ziua 1
x-35%x=65%x
65%x × 20%=1300x/10000=13%x=ziua 2
35%x+13%x+624=x
35x+13x+62400=100x
52x=62400
x=1200 km
Ionică2001
notam cu x distanta
1 zi =35/100*x=35x/100
2 zi =20/100*(x-35x/100)=2/10*65x/100=130x/1000=13x/100
3 zi =624km
35x/100+13x/100+624=x
48x/100+624=x
48x+62400=100x
48x-100x=-62400
52x=62400
x=1200
                   R:1200km

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