Respuesta:
54 - x ≤ 36
54 - 36 ≤ x
18 ≤ x
Entonces x ∈ [18, +∞ >
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Respuesta:
54 - x ≤ 36
54 - 36 ≤ x
18 ≤ x
Entonces x ∈ [18, +∞ >