Question

Numerele x;y;8 si numerele 12;18;72 sunt invers proportionale ​

Answer 1

Răspuns:

Explicație pas cu pas:

[x, y, 8]  i.p [ 12, 18; 72]

⇒ x/(1/12) = y/(1/18 ) = 8/(1/72)

x/(1/12) = 8 : (1/72)

x : (1/12) = 8 × 72

12 x = 8 × 72   [ : 12

x = 8 × 6

x = 48

________________

y/(1/18) = 8 × 72

18 y = 8 × 72   [  : 18

y = 8 × 4  

y = 32

Answer 2

{ x ; y ; 8 } i.p { 12 ; 18 ; 72 }

12 x = 18 y = 8 × 72

12 x = 18 y = 576

12 x = 576 => x = 576 / 12 = 48

18 y = 576 => y = 576 / 18 = 32