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La semisuma = 32
La suma = 64
El numero mayor = x
El numero menor = 32 - x
x - ( 64 - x) = 12
x - 64 + x = 12
2x - 64 = 12
2x = 12 + 64
2x = 76
x = 76/2
x = 38
El numero mayor = x = 38
El numero menor = 64 - 38 = 26
El triple del menor = 3 * 26 = 78
Respuesta.
78
a+b=64
a-b=12
<> a=38
b=26
menor es 26
por lo tanto 26x3 = 78 rpta