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Program: CRAMER
CRAMER
- Solves systems of linear equations in two or three variables. (The program does this by a method known as Cramer's Rule, which is why it is called 'CRAMER'.)
Useful for:
- SAT
- ACT
- Algebra 1
- Geometry
- Algebra 2
- Precalculus
- Calculus
- College Algebra
Try these problems using CRAMER:
Example 2
Q: Solve the system of equations:
4x + 2y + z = 9
5y - z = 9
8x -4y + z = 1
Solution: First, put both the equations in standard form to identify the coefficients:
4x + 2y + 1z = 9
0x + 5y - 1z = 9
8x - 4y + 1z = 1
Run CRAMER. How?
Enter '3' for three
variables (x, y, z).
Enter the coefficients
shown in red above,
from left to right,
for A through L.
The program reports:
Interpretation: x = 1, y = 2, and z = 1
See Example 1