Azma, N., Mania, S. and Baharuddin 2024. Development of A Diagnostic Test in The Form of A Three Tier Essay Test to Identify Understanding of Mathematical Concepts on The Material of The System of Linear Equations of Three Variables. Alauddin Journal of Mathematics Education. 6, 1 (May 2024), 1-23. DOI:https://doi.org/10.24252/ajme.v6i1.43850.