Finding an equation in the solver list, Shared variables, Clearing variables – HP 17bII+ User Manual
Page 162
162 12: The Equation Solver
File name : English-M02-1-040308(Print).doc Print data : 2004/3/9
Finding an Equation in the Solver List
To display an entry in the Solver list, display the SOLVE menu and move
through the list using the
[
and
]
keys.
@[
moves to
and
@]
moves to .
Shared Variables
If two or more equations contain the same variable, that variable is
shared among those equations. For example, suppose your Solver list of
equations includes these two equations labeled RUG, which figures the
cost of a carpet, and TOTAL, which figures the total cost of buying a
carpet and installing it:
COST is a shared variable. You can calculate a value for COST using
the RUG equation, then switch to the TOTAL equation and calculate
CHARGE after entering HOURS. Since the value for COST is shared,
you do not need to store it again.
No sharing occurs between variables outside the Solver and those
within the Solver. For example, this COST variable in the Solver is not
shared with the COST variable in the MU%C and MU%P menus in BUS.
To transfer values between built-in variables and Solver variables, store
them into storage registers. Recall them after switching menus.
Remember that the value in the calculator line stays there when you
switch menus.
Clearing Variables
You can clear the variables in a Solver equation just as you clear
variables in other menus: press
@c
while the menu with those
variables is displayed.