4-1
Chapter 4 Equation Calculations
From the Main Menu, enter the Equation mode.
• { SIMUL } ... {linear equation with 2 to 6 unknowns}
• { POLY } ... {degree 2 to 6 equation}
• { SOLVER } ... {Solve calculation}
1. Simultaneous Linear Equations
You can solve simultaneous linear equations with two to six unknowns.
• Simultaneous Linear Equation with Two Unknowns:
a
1
x
+ b
1
y
= c
1
a
2
x
+ b
2
y
= c
2
• Simultaneous Linear Equation with Three Unknowns:
a
1
x
+ b
1
y
+ c
1
z
= d
1
a
2
x
+ b
2
y
+ c
2
z
= d
2
a
3
x
+ b
3
y
+ c
3
z
= d
3
…
1. From the Main Menu, enter the Equation mode.
2. Select the SIMUL (Simultaneous) mode, and specify the number of unknowns (variables).
You can specify from 2 to 6 unknowns.
3. Sequentially input the coefficients.
• The cell that is currently selected for input is highlighted. Each time you input a coefficient,
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 coefficients.
• You can cancel the value you are inputting for the current coefficient by pressing J at
any time before you press w to store the coefficient value. This returns to the coefficient
to what it was before you input anything. You can then input another value if you want.
• To change the value of a coefficient that you already stored by pressing w, move the
cursor to the coefficient you want to edit. Next, input the value you want to change to.
• Pressing 3(CLEAR) clears all coefficients to zero.
4. Solve the equations.
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