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154 12: The Equation Solver
File name : 17BII-Plus-Manual-E-PRINT-030709 Print data : 2003/7/11
Regardless of how you do this calculation (even if you do it longhand),
you are using an equation:
Next Forecast = Old Forecast + Change in Old Forecast
= Old Forecast + (Projected Percentage Changes
xOld Forecast)
or:
NEXT = OLD + ((A% + B% + C%) ÷ 100 x OLD)
Using the SOLVE and ALPHAbetic menus, you can type in this equation
as
<HX:8E9A)L16)J6)76TD#((BE9A"
and then automatically create this menu ―which contains all the
variables’ labels―by pressing
I
E
:
*
Each menu label represents a variable. You can use them to store and
calculate values the same way you use other menus and their built-in
variables.
Entering a Solver Equation. To type this equation, you must use the
ALPHA menu. If you are not familiar with the ALPHAbetic menu, refer to
“ Typing Words and Characters ” on page 30.
Keys: Display: Description:
&
/
!
:@5H HY41:;E<Q"
V;<54:W"
Displays SOLVE menu,
then ALPHA menu.
NEXT
=
OLD
" The equation is too long
*
Because the Solver uses arithmetic priority (
B
,
D
before
)
,
/
), a second set of
parentheses (before A% and after the second OLD) is not necessary. See
“Order of Calculations,” page 165.