HP 300s Scientific Calculator User Manual
Page 72
66
Simultaneous Linear Equations
1. Simultaneous Linear Equations with Two Unknowns:
a
1
x + b
1
y = c
1
a
2
x + b
2
y = c
2
2. Simultaneous Linear Equations 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
• Use the coefficient editor screen to input the coefficients of
an equation. The coefficient editor screen shows input
cells for each of the coefficients required by the currently
selected equation type.
• When simultaneous linear equations with three unknowns
are selected as the equation type, the d column will not be
visible on the display when the coefficient editor screen is
first displayed. The d column will become visible when you
move the cursor to it, which causes the screen to shift.
Example: To solve the following equations x + 2y = 5 and 3x -
2y = 3 (x = 2, y = 1.5)
(EQN)
Two unknowns
Three unknowns
KEY IN
DISPLAY
DISPLAY
or