Question

Am Nevoie de Ajutor Urgent !!! dau coroana​

Answer 1

Răspuns:

2.

I zi : x/5 => rest 4x/5

II zi : 4x/5 • 1/3 = 4x/15 =>rest 4x/5 - 4x/15 = 8x/15

III zi : 8x/15 • 1/4 = 2x/15

IV zi : 1320

x/5 + 4x/15 + 2x/15 + 1320 = x

3x+4x+2x+1320•15=15x

6x=1320•15

x=220•15

x=3300

3.

Mircea : x/4 =>rest 3x/4

Narcis : 1/5 • 3x/4 = 3x/20 =>rest 3x/4 - 3x/20 = 12x/20 = 3x/5

Andrei : 3x/5 • 1/3 + 7 = x/5 + 7

Dan : 25

x/4 + 3x/20 + x/5 + 7 + 25 = x

5x+3x+4x+32•20=20x

8x=32•20

x=80

4.

I oră : x/6 =>rest 5x/6

II oră : 1/4 • 5x/6 = 5x/24 =>rest 5x/6 - 5x/24 = 15x/24 = 5x/8

III oră : 1/2 • 5x/8 = 5x/16 =>rest 5x/16

IV oră : 1/3 • 5x/16 = 5x/48

V oră : 20

x/6 + 5x/24 + 5x/16 + 5x/48 + 20 = x

8x+10x+15x+20•48=48x

15x=20•48

x=64