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Número mayor = x
Número menor = 30 - x
2x = 4(30 - x) + 6
2x = 120 - 4x + 6
2x = 126 - 4x
2x + 4x = 126
6x = 126
x = 126/6
x = 21
El número mayor = x = 21
El número menor = 30 - x = 30 - 21 = 9
Respuesta.
Opción d)