APONTE VERA , A. L.; CASA CASA , M. H.; BARRERA JIMENEZ, R.; PÉREZ BARRERA, H. M. Design of a didactic sequence to address frequent errors in 2×2 linear equation systems at U.E. Gonzalo Zaldumbide. Ciencia Digital, v. 10, n. 3, p. 169-190, 28 Aug. 2026.