Answer
See below.
Work Step by Step
$4x+10y=20\\4x=20-10y\\x=5-2.5y$
Thus $2(5-2.5y)+5y=10\\10-5y+5y=10\\10=10$
This is always true, thus we have infinitely many solutions.
College Algebra (10th Edition)
by Sullivan, Michael
Published by
Pearson
ISBN 10:
0321979478
ISBN 13:
978-0-32197-947-6
Chapter 8 - Review Exercises - Page 634: 7
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