fx-9860GII
SIML
On a Casio calculator you can select simultaneous linear equations
SIML F1
Explanation
Simultaneous
Data Exists In Memory
Unknowns:2
Number Of Unkowns?
2 - 6 Equations with 2 to 6 unknowns
Example 1
To solve the equations with 5 unkowns enter all data
anX+bnY+∙∙∙+enU=fn
a b c d 1 1 1 1 1 2 16 8 4 2 3 81 27 9 3 4 256 64 16 4 5 625 125 25 5 16
SOLV ≣
anX+bnY+∙∙∙+enU=fn
X 0.0416 Y -0.25 Z 0.9583 T -0.75 U 1 1┘24
Be sure to select SET UP Input/Output Line.