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Chapter 5
Equation Solvers
Simultaneous Linear Equations
Simultaneous linear equations with two unknowns (2-VLE) or with three
unknowns (3-VLE) may be solved using this function.
1 2-VLE: b 3 0
x + b
a
1
x + b
a
2
2 3-VLE: b 3 1
x + b
a
1
x + b
a
2
x + b
a
3
• If the determinant D = 0, an error occurs.
• If the absolute value of an intermediate result or calculation result is equal
to or greater than 1 × 10
• The results obtained by this function may include a margin of error.
Example 1
2x+3y = 4
5x+6y = 7
Press b 3 0 to select 2-
1.
VLE of the EQN mode.
2.
Enter the value of each coefficient
(a1, etc.)
2 e 3 e 4 e
5 e 6 e 7
• Coefficients can be entered using ordinary arithmetic operations.
• To clear the entered coefficients, press j.
• Press d or u to move line by line. Press @ d or @
u to jump to the last or top line.
y = c
1
1
y = c
2
2
y + c
z = d
1
1
1
y + c
z = d
2
2
2
y + c
z = d
3
3
3
100
, an error occurs.
x = ?
Ò
y = ?
det(D) = ?
a
b
1
1
D =
a
b
2
2
a
b
c
1
1
1
D =
a
b
c
2
2
2
a
b
c
3
3
3
a⁄z
b⁄
c⁄
0.
0.
0.
69
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