Farida, A., Indah, R.P. and Rohman, S.N. 2022. The Effectiveness and Practicality of the 3x3 Gauss-Jordan Application. International Journal of Social Science, Education, Communication and Economics (SINOMICS Journal). 1, 5 (Dec. 2022), 623–630. DOI:https://doi.org/10.54443/sj.v1i5.70.