Question

Mihai a parcurs 30% dintrun drum si mai are de parcurs inca 210 km . Cat km are drumul

Answer 1

Răspuns:

x=drumul

30x/100=3x/10

3x/10+210=x

3x+2100=10x

2100=10x-3x

2100=7x=>x=2100:7=>x=300 km are drumul

verificare:

30·300:100=90 km reprezinta 30% din drum

90+210= 300 km