Răspuns:
a) x = 6; y = 9; z = 12.
b) x = 8; y = 12; z = 16.
c) x = 10; y = 15; z = 20.
Explicație pas cu pas:
[x, y, z] d.p. [2, 3, 4]
x/2 = y/3 = z/4 => k
x = 2k
y = 3k
z = 4k
a) x+y+z=27
2k + 3k + 4k = 27
9k = 27
k = 27 : 9
k = 3
x = 2 × 3 = 6
y = 3 × 3 = 9
z = 4 × 3 = 12
b) x+y+z=36
2k + 3k + 4k = 36
9k = 36
k = 36 : 9
k = 4
x = 2 × 4 = 9
y = 3 × 4 = 12
z = 4 × 4 = 16
c) x+y+z=45
2k + 3k + 4k = 45
9k = 45
k = 45 : 9
k = 5
x = 2 × 5 = 10
y = 3 × 5 = 15
z = 4 × 5 = 20