Casio SERIES FX-9860G - Manual (Page 168)

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4-1-1
Simultaneous Linear Equations
4-1 Simultaneous Linear Equations
Description
You can solve simultaneous linear equations with two to six unknowns.
• Simultaneous Linear Equation with Two Unknowns:
a
1
x
1
+ b
1
x
2
= c
1
a
2
x
1
+ b
2
x
2
= c
2
• Simultaneous Linear Equation with Three Unknowns:
a
1
x
1
+ b
1
x
2
+ c
1
x
3
= d
1
a
2
x
1
+ b
2
x
2
+ c
2
x
3
= d
2
a
3
x
1
+ b
3
x
2
+ c
3
x
3
= d
3
…
Set Up
1. From the Main Menu, enter the EQUA mode.
Execution
2. Select the SIML (simultaneous equation) mode, and specify the number of unknowns
(variables).
You can specify from 2 to 6 unknowns.
3. Sequentially input the coeffi cients.
The cell that is currently selected for input is highlighted. Each time you input a
coeffi cient, the highlighting shifts in the sequence:
a
1
→ b
1
→ c
1
→ … a n
→ b n
→ c n
→ ( n = 2 to 6)
You can also input fractions and values assigned to variables as coeffi cients.
You can cancel the value you are inputting for the current coeffi cient by pressing J
at any time before you press w to store the coeffi cient value. This returns to the
coeffi cient to what it was before you input anything. You can then input another value if
you want.
To change the value of a coeffi cient that you already stored by pressing w, move the
cursor to the coeffi cient you want to edit. Next, input the value you want to change to.
Pressing 3(CLR) clears all coeffi cients to zero.
4. Solve the equations.