Question

ajutor urgent dau coroana !!!!
un autocar parcurge un traseu in 3 zile , in prima zi a parcurs 20% din drum , in a doua zi a parcurs 30% din rest , si in ultima zi 560 km , aflati lungimea drumului parcurs de autocar in cele 3 zile

Answer 1

[tex]x=lungimea\ drumului\\ \frac{20x}{100}+\frac{30}{100}(x-\frac{20x}{100})+560=x\\ \frac{2x}{10}+\frac{3}{10}*\frac{80x}{100}+560=x\\ \frac{2x}{10}+\frac{24x}{100}+560=x\\ 20x+24x+56000=100x\\ 44x+56000=100x\\ 56x=56000 \Rightarrow x=1000\ km\\ R:Drumul\ are\ 1000\ km.[/tex]