Answer
$-x + 3y = -40$
$y = \frac{x}{3} - \frac{40}{3}$
Work Step by Step
$-6x + 18y = -240$
6, 18 and 240 are multiples of 6, and therefore can divide the whole equation by 6.
$-x + 3y = -40$
$3y = x - 40$
$y = \frac{x}{3} - \frac{40}{3}$
Elementary Geometry for College Students (5th Edition)
by Alexander, Daniel C.; Koeberlein, Geralyn M.
Published by
Brooks Cole
ISBN 10:
1439047901
ISBN 13:
978-1-43904-790-3
Chapter 10 - Section 10.5 - Equations of Lines - Exercises - Page 487: 3
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