1.4/4 - drumul pe care il are de parcurs
4/4- 1/4 =3/4-drumul pe care el mai are de strabatut dupa prima zi
1/4*x+5/6*3/4*x=1/4*15/24=21/24=7/8-drumul parcurs in primele 2 zile
8/8-drumul parcurs in cele 3 zile
8/8*x-7/8=1/8-drumul parcurs in a 3-a zi
1/8*x=28
x=28*8
x=224 drumul pa care il are de parcurs
2. [tex] \frac{2}{9}*x+7+ \frac{3}{7}* \frac{2}{9}*x+7+4+3.92=x [/tex]
[tex] \frac{2x}{9} + \frac{6x}{63}+21.92=x [/tex]
21.92=x-2x/9-6x/63 (aducem toata ecuatia la acealsi numitor adica 63)
1380.96/63=63x/63-14x/63-6x/63 |*63 (ca sa redudem numitorii)
1380.96=43x
x=1380.96:43
x=32.115-suma initiala
