2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/132628We prove that the finitely presentable subgroups of residually free groups are separable and that the subgroups of type $\mathrm{FP}_\infty$ are virtual retracts. We describe a uniform solution to the membership problem for finitely presentable subgroups of residually free groups.8 pages, no figuresGroup Theory20F65 (20E26, 20E05)text