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<response><unit><id>21f4991f-d11b-47f3-93fa-9ec974c35cd4</id><parent_id>70171ba2-4be5-4058-993e-af8590e97001</parent_id><number>1.3.3.4</number><names>[{"lang":"es","name":"Método de Gauss"},{"lang":"en","name":"Gaussian elimination method"},{"lang":"ca","name":"Mètode de Gauss"}]</names><difficulty>8</difficulty><created>18/7/16 11:43</created><modified>18/7/16 11:43</modified></unit></response>
