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
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
