fx-9860GII TI-83
Solver
On a TI calculator you can select the equation solver
MATH 0
Explanation
EQUATION SOLVER eqn:0=
Example 1
To solve the simultaneous linear equations with 5 unkowns enter all data
anX+bnY+∙∙∙+enU=fn
a b c d e f 1 1 1 1 1 1 1 2 16 8 4 2 1 2 3 81 27 9 3 1 4 4 256 64 16 4 1 8 5 625 125 25 5 1 16 16
SOLV DEL CLR EDIT
SOLV ≣
anX+bnY+∙∙∙+enU=fn
X 0.0416 Y -0.25 Z 0.9583 1 24
REPT
Be sure to select SET UP Input/Output Math.