Question

Ofer coroana ! Va rog ajutor!​

Answer 1

Răspuns:

Explicație pas cu pas:

Produsul mezilor = produsul extremilor =>

a)  x/30  = 5/6  => x = (5·30):6 = 150:6 = > x = 25

b) 15/x = 5/6  => x = (15·6):5 = 90:5 = > x = 18

c) 9x/108  = 5/6  => x = (108·5):(9·6) = 540:54 => x = 10

d) (3x+2)/24 = 5/6  <=>

6·(3x+2) = 24·5  <=> 18x+12 = 120 <=>

18x = 120-12  <=> 18x = 108  => x = 108:18 => x = 6