Question

x/2=y/5=z/11 si x+y=28.aflați x,y,z​

Answer 1

x/2 = y/5 = z/11 = k ⇒ x = 2k ; y = 5k ; z = 11k

x + y = 28

2k + 5k = 28

7k = 28

k = 4

x = 2 · 4 = 8

y = 5 · 4 = 20

z = 11 · 4 = 44

Answer 2

Răspuns:

x=8, y=20, z=44

Explicație pas cu pas:

x/2=y/5 deci x=2y/5

x+y=28 deci 2y/5+y=28

7y/5=28 deci y=28x5/7=20

x=2y/5 deci x=2x20/5=8

x/2=z/11 deci z=11x/2=11x8/2=44