Пусть a,b,c -- искомые числа.
Тогда b = 2a, a = b/2
b = c/3, c = 3b
(a + b + c)/3 = 12
a + b + c = 36
b/2 + b + 3b = 36
b + 2b + 6b = 72
9b = 72
b = 8
a = b/2 = 8/2 = 4
c = 3b = 3*8 = 24
Ответ: 4; 8; 24.
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Пусть a,b,c -- искомые числа.
Тогда b = 2a, a = b/2
b = c/3, c = 3b
(a + b + c)/3 = 12
a + b + c = 36
b/2 + b + 3b = 36
b + 2b + 6b = 72
9b = 72
b = 8
a = b/2 = 8/2 = 4
c = 3b = 3*8 = 24
Ответ: 4; 8; 24.