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System of Equations Solver

Solve 2x2 and 3x3 systems of linear equations

2×2 Linear System Solver

2x + 3y = 13
4x + -1y = 5
a₁
b₁
c₁ (RHS)
a₂
b₂
c₂ (RHS)

Solution

x
2.0000
y
3.0000
det
-14.0000

A system of linear equations is a set of two or more equations with the same variables. The solution is the point(s) where all equations are satisfied simultaneously.

  1. 12×2 system: use Cramer's rule or elimination
  2. 2Determinant det = a₁b₂ − a₂b₁
  3. 3x = (c₁b₂ − c₂b₁)/det
  4. 4y = (a₁c₂ − a₂c₁)/det
2x+3y=13, 4x−y=5=x=2, y=3
x+y=5, 2x−y=4=x=3, y=2
detSolution typeGeometric interpretation
≠0Unique solutionLines intersect at one point
=0, consistentInfinite solutionsLines are identical
=0, inconsistentNo solutionLines are parallel
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