HP 40gs - Manual (Page 280)

16-6 Step-by-Step Examples
Press , select
LINSOLVE and press .
Enter 17 X 20
Y 90
10
X 25 Y
90 X
Y
If you are working in step
by step mode, pressing
produces the result
at the right.
Press again to
produce the next step in the
solution:
Press again to
produce the reduction
result:
Pressing again
produces the final result:
If you select , and press
you get X = 2 and Y
= 2.8. In other words, the
price of one biscuit is 2
cents, and the price of one
macaroon is 2.8 cents.
Exercise 5
Suppose that A and B are points having the coordinates
(–1, 3) and (–3,–1) respectively, and where the unit of
measure is the centimetre.
17x 20y 90 = +
10x 25y 90 = +
14
5
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