Question

ofer 55 puncte la persoana care rezolva aceste 3 probleme +sa explice Cum a efectuat rezolvările
va rog mult

Answer 1

(1)
x=numarul elevilor care studieaza la Pitagora  ;
x = x/2 + x/4 + x/7 + 3   | *28
28x = 14x + 7x + 4x +84
28x-25x = 84
         3x = 84
           x = 28 (elevi)
(2)
6/6 - 1/6 = 5/6 
5/6 + 1/6 = 6/6
6/6 - 1/3 = 6/6 - 2/6 = 4/6
4/6 + 2/6 = 6/6
6/6 - 3/6 = 3/6
3/6 + 3/6 = 6/6
6/6 - 6/6 = 0
 a baut  cafea si lapte in mod egal
lapte: 1/6 + 2/6 +3/6 = 6/6
cafea: 6/6 cana plina
(3)
x=nr piersici initial
x/3 = Atos
x-x/3=2x/3 =rest
2x/3 *1/3=2x/9 =Portos
2x/3-2x/9=(6x-2x)/9=4x/9=rest
4x/9 *1/3=4x/27=Aramis
x/3+2x/9+4x/27+8=x
9x+6x+4x+216=27x
8x=216
x=27 piersici