Question

Ajutor va rog repede !!​

Answer 1

Răspuns:

1.

I zi : 2x/3 =>rest x/3

II zi : x/3 • 1/4 = x/12

III zi : 75

2x/3 + x/12 + 75 = x

8x+x+75•12=12x

3x=75•12

x=300

2.

I lună : x/7 =>rest 6x/7

II lună : 2/6 = 1/3 ; 1/3 • 6x/7 = 2x/7 =>rest 4x/7

III lună : 3/5 • 4x/7 = 12x/35

IV lună : 72

x/7 + 2x/7 + 12x/35 + 72 = x

5x+10x+12x+72•35=35x

8x=72•35

x=315

3.

I zi : x/2 =>rest x/2

II zi : 2/3 • x/2 + 17 = x/3 + 17

III zi : 58

x/2 + x/3 + 17 + 58 = x

3x+2x+75•6=6x

x=450