Algebra: A Combined Approach (4th Edition)

Published by Pearson
ISBN 10: 0321726391
ISBN 13: 978-0-32172-639-1

Chapter 4 - Section 4.2 - Solving Systems of Linear Equations by Substitution - Exercise Set: 9

Answer

x = 2 y = -1

Work Step by Step

3x - 4y = 10 y = x - 3 Substitude y = x - 3 to the first equation 3x - 4 ( x - 3 ) = 10 3x - 4x + 12 = 10 use the distributive property - x + 12 = 10 simpify -x +12 - 12 = 10 - 12 -x = -2 multiply by (-1 )to both sides x = 2 y = 2 - 3 substitude x for 2 to the second equation y = -1
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