HP (Hewlett-Packard) 50g ユーザーズマニュアル

Page 27-8

When you design a set of equations, you should do it with an understanding of 
how the Multiple-Equation Solver uses the equations to solve problems.

The Multiple-Equation Solver uses the same process you’d use to solve for an 
unknown variable (assuming that you were not allowed to create additional 
variables).  You’d look through the set of equations for one that has only one 
variable that you didn’t know. You’d then use the root-finder to find its value. 
Then you would do this again until you’ve found the variable you want.

You should choose your equations to allow likely unknown variables to occur 
individually in equations. You must avoid having two or more unknown 
variables in all equations. You can also specify equations in an order that’s best 
for your problems.

!!!!!!!!!X0!!!!!!!!!

Value x0 is not defined by you and not used in the last solution. 
It can change with the next solution.

!!!!!!!X0!!ëëëë!!!

Value x0 is not defined by you, but it was found in the last 
solution. It can change in the next solution.

$$X0$$

Value x0 is defined by you and not used in the last solution. It 
cannot change in the next solution (unless you solve only for this 
variable).

$#X0#qqqq!

Value x0 is defined by you and used in the last solution. It 
cannot change in the next solution (unless you solve only for this 
variable).