Texas Instruments TITANIUM TI-89 - Manual (Page 261)

Symbolic Manipulation 261
To see intermediate results, you can manually solve the equation step-by-step.
Note: An operation such as |
2
p subtracts 2x from both sides.
Solving a System of Linear Equations Solving a System of Linear Equations Solving a System of Linear Equations Solving a System of Linear Equations
To solve this system of equations, use any of the following methods.
Consider a set of two equations with two
unknowns: 2x N 3y = 4
L x + 7y = L 12
Method Example
Use the solve function for a one-step
solution. solve(2x N 3y=4 and L x+7y= L 12,{x,y})
Use the solve function with
substitution ( | ) for step-by-step
manipulation. Substitutions are in the form of an
equality, such as x=3 or y=sin(x). To
be most effective, the left side should
be a simple variable.
See ”Symbolic Manipulation” in the
Previews chapter, which solved for
x =
L 8/11 and y = L 20/11.
x
«
y
|
5
Á
2x
|
5y
|
2 x
|
y
«
5
p ?
1