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164 12: The Equation Solver
File name : 17BII-Plus-Manual-E-PRINT-030709 Print data : 2003/7/11
Deleting One Equation or Its Variables (DELET)
To delete an equation or its variables:
1. Display the equation.
2. Press
j
in the SOLVE menu.
3. To delete the equation, respond
W
to both questions:
AH9H:H
:MH
O12;1J9HFU"
AH9H:H
:MH
HY41:;E<U"
(If the entry has no variables allocated, then only the second question
appears.)
4. To delete just the variables, respond
X
to
AH9H:H
:MH
HY41:;E<U
. This preserves the equation.
Deleting All Equations or All Variables in the Solver
(
@c
)
To delete all the equations in the Solver, or just all the variables in all the
equations:
1. Display the SOLVE menu. It doesn’t matter which equation is
displayed.
2. Press
@c
. To delete all equations, respond
W
to both
questions:
AH9H:H
199
O12;1J9HFU"
AH9H:H
199
HY41:;E<FU"
3. To delete just the variables, respond
X
to
AH9H:H
199
HY41:;E<FU
. This preserves all equations.
Writing Equations
An equation in a book looks different from an equation in the Solver. A
numerator and denominator might be separated by a bar, such as