Answer
$y=3$ and $x=-6$
Work Step by Step
$0.2x - 0.2y= -1.8$ (1)
$-0.3x + 0.5y = 3.3$ (2)
Divide both sides of (1) for 0.2 we have $x-y=-9 \Rightarrow x=y - 9 $
Plug x=y - 9 into (2): $-0.3(y-9) + 0.5y = 3.3$
$0.2y=0.6$
$y=3$ so $x=-6$
College Algebra 7th Edition
by Stewart, James; Redlin, Lothar; Watson, Saleem
Published by
Brooks Cole
ISBN 10:
1305115546
ISBN 13:
978-1-30511-554-5
Chapter 5, Systems of Equations and Inequalities - Section 5.1 - Systems of Linear Equations in Two Variations - 5.1 Exercises - Page 446: 34
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