Instructions For Using - HP -22S Owner's Manual

Viewing Briefly-Displayed Information. Two situations in
1
EVAL
1
and
1
SOLVE
1
cause information to be displayed briefly:
• Newly-Assigned Values.
Mter you've pressed
1
INPUT
1
in response
to a prompt, the HP-22S temporarily displays
letter=new value
be-
fore proceeding. To lengthen the viewing time for the new value,
hold down the
1
INPUT
1
key.
• Labels and Long Numbers.
If a variable and its value are too long
to fit in the display, the letter is displayed briefly. For example, if
the current value for A is 1,234,567,891.23, the prompt for A is:
A?
1.234,567,891.23
Displayed briefly.
HP-22S awaits input.
To see the first part of the prompt again, press
.1
SHOW
I.
Instructions for Using
I
SOLVE
I
Use
1 SOLVE 1
when the unknown variable is
not
by itself on the left side
of the equation. To solve for a variable:
1. Optional:
Enter your own guesses for the answer. (See "Entering
Your Own Initial Guesses" on page 87.)
2. Press
.1
SOLVE
I.
3. If the equation has more than one variable, the HP-22S displays
a menu of all the variables in the equation. Select the unknown
variable by pressing the appropriate menu key. (For equations
with more than six variables, use the menu key
{~},
if neces-
sary, to display the rest of the variables.)
4. The HP-22S prompts (requests values) for each known variable
by displaying
letter?value,
where
value
is the current value of the
variable. Respond to each prompt:
• To retain the current value, press
1
INPUT
I .
• To store a different value, key in a number (use
ElJ
for nega-
tive numbers) or an algebraic expression (for example, 1306
(0) and press
1
INPUT
I.
6: Evaluating and Solving Equations 77