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Número menor = x
Número mayor = 144 - x
7/2 = (144 - x)/x
7x = 2(144 - x)
7x = 288 - 2x
7x + 2x = 288
9x = 288
x = 288/9
x = 32
El número menor es el 32
La suma de sus cifras = 3 + 2 = 5
Respuesta.
Opcion d
7k+2k=144
9k=144
k=16
7.16=112
2.16=32