Question

un pic de ajutor va rog , eventual si o explicatie pas cu pas
mersi​

Answer 1

Răspuns:

x = 15/2 = 7,5

Explicație pas cu pas:

KT = (6x+6)/5  

KB = 11x/5 - 6/5 = (11x-6)/5

KT= 2/3 ·KB =>

(6x+6)/5  = 2/3 ·(11x-6)/5 <=>

³⁾(6x+6)/5  = 2·(11x-6)/15 <=>

18x+18 = 22x-12 =>

22x-18x = 18+12 =>

4x = 30 => x = 15/2 = 7,5 =>

KT = (6·15/2 + 6)/5 = 51/5 = 10,2

KB = (11·15/2)/5 - 6/5 = 165/10 - ²⁾6/5 = (165-12)/10 = 153/10 = 15,3

2/3 ·KB = 2/3 ·15,3 = 30,6/3 = 10,2 = KT , corect