Precalculus: Mathematics for Calculus, 7th Edition

Published by Brooks Cole
ISBN 10: 1305071751
ISBN 13: 978-1-30507-175-9

Chapter 10 - Section 10.1 - Systems of Linear Equations in Two Variables - 10.1 Exercises - Page 688: 38

Answer

No Solution

Work Step by Step

Given system is- $-3x +5y$ = $2$ __ eq.1 $9x -15y$ = $6$ __ eq.2 Multiplying eq.1 by '3'- $-9x +15y$ = $6$ __ eq.3 Adding eq.2 and eq.3 - $9x -15y+9x -15y$ = $6+6$ $0$ = $12$ Which is obviously false statement. No matter what values we assign to x and y, we cannot make this statement true, so the system has no solution. Thus given system has no solution.
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