Solve 2×2 and 3×3 systems of linear equations using Cramer's Rule.
Last updated: June 2026 | By Patchworkr Team
Coefficients and constants
Fill every field with a finite number before solving.
Results
Cramer's Rule solves systems of linear equations by dividing determinant replacements by the determinant of the coefficient matrix.
What if det(A) is zero?
Cramer's Rule does not produce a unique solution when the coefficient determinant is zero.
Can I use decimals?
Yes. The fields accept finite decimal and scientific-notation values.
What if I leave a field blank?
Blank fields are rejected before solving.
Why show the determinants?
They let you verify the computation rather than trusting the final answer blindly.
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