Click here for a 2 unknown calculator
Click here for a 4 unknown calculator

Equations are entered in this manner:
aX + bY + cZ = d

EXAMPLE: For the equations:
2X   + 3Y     + 4Z = 119
5X   – 6Y     + 7Z =   80
8X  + 9Y   + 10Z = 353

You would enter:
Equation 1) 2  3  4 119
Equation 2) 5 -6  7  80
Equation 3) 8  9 10 353

Click E N T E R for the answers:
X=12    Y=13    Z=14

Equation 1)
Equation 2)
Equation 3)

Click the “RESET” button to clear all of the boxes.

This calculator (as well as the 2 unknown and 4 unknown calculator)
finds the solutions by evaluating determinants using Cramer’s rule.