Cramer's rule (2×2 system) (x = det(A_x)/det(A) with column replacement.)
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x = det(A_x)/det(A) with column replacement.
What each symbol means
| Symbol | What it stands for |
|---|---|
| Δ | det of coefficient matrix |
| Δ_x | Replace x-column with constants |
When to use this
Unique solution when Δ≠0.