Question

un automobilist a parcurs o distanta in 3 zile astfe:in prima zi a parcurs 35%din intreaga distanta, in a doua zi 20%din distanta ramasa,iar in a treia zi restul de 624km.
a)citi kmare intreaga distanta?
b)citi km a parcurs in a doua zi?

Answer 1

1-a zi)   35x/100   ;     x -35x/100 =100x /100-35x/100 =65x /100    ramas
2-a zi)    20/100*  65x/100 =1300x /10000 =13x /100
3-azi)     624 km

35x/100+13x/100+624 =x     numitor 100
35x+13x+62400 =100x
100x-35x-13x =62400
52x =62400
x =62400:52 =1200 km

1-a zi )   35x/100 =35*1200/100 =420 km
2-azi)      13x/100 =13*1200/100 =156 km

verif  ;   420+156+624 =1200 km