Question

Marius are de rezolvat intr-o sapt 80 deprobleme stiind ca in primele 3 zile a rezolvat 40% din nr problemelor aflati cate probleme mai are Marius de rezolvat in celelalte 4 zile ramase.

Answer 1

x-nr problemelor
x=80

40% din x=  40/100 * x=  10/25 * x= 2/5 * x=   2x/5 -a rezolvat in primele 3 zile

2x/5= 2*80/5= 2*16=32 probleme a rezolvat

80-32=38 probleme mai are de rezolvat

Answer 2

t=80
a=40%t=80*40/100=32
b=60%t=t-a=80-32=48