Question

Salut ! Rezolvati-mi si mie asta :
Un automobil a parcuts o distanta in 3 zile astfel: in prima zi a parcurs 7 supra 20 dub drum, a doua zi a parcurs 2 supra 5 din distanta ramasa,iar a treia zi a parcurs restul de 624 km.
a) Cati km a parcurs automobilul in a doua zi ?
b) Cati km are intreaga distanta ?
Repede plss
Multumesc anticipat !

Answer 1

in total: 560+416+624=1600 km

Answer 2

7x/20+2/5*13x/20+624=x
7x/20+26x/100+624=x
35x/100+26x/100+624=x
624=x-61x/100
624=39x/100
39x/100=624
 x=624:29/100=624*100/39=1600km , cerinta