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Ksolving linear equations with three unknowns – Casio fx-9750G PLUS User Manual

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102

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Linear Equations with Two to Six Unknowns

k

k

k

k

k

Solving Linear Equations with Three Unknowns

Example

To solve the following linear equations for

x

,

y

, and

z

:

4

x

+

y

– 2

z

= –1

x

+ 6

y

+ 3

z

= 1

–5

x

+ 4

y

+

z

= –7

1. While in the Linear Equation Mode (SIML), press 2 (3), because the linear

equations being solved have three unknowns.

2. Input each coefficient.

ewbw-cw-bw

bwgwdwbw

-

fwewbw-hw

Each time you press w, the input value is registered in the highlighted cell.
Each press of w inputs values in the following sequence:

coefficient

a

1

→ coefficient

b

1

→ coefficient

c

1

→ coefficient

d

1

coefficient

a

n

→ coefficient

b

n

→ coefficient

c

n

→ coefficient

d

n

(

n

= 2 to 6)

• You can input fractions and value memory contents as coefficients.

3. After inputting the coefficients, solve the equations.

1

(SOLV)

Coefficient input cells

Value being input into highlighted cell

1

2 3 4 5 6

1

2 3 4 5 6

·

·

·

·

Highlighted solution cell value

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