Algebra: A Combined Approach (4th Edition)

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

Chapter 4 - Test - Page 330: 9

Answer

$$x=-4$$ $$y=1$$

Work Step by Step

Equation 1: $3x - 2y = -14$ Equation 2: $y = x + 5$ Substitute equation 2 to equation 1: $$3x - 2y = -14$$ $$3x - 2(x + 5) = -14$$ $$3x - 2x - 10 = -14$$ $$x-10=-14$$ Add $10$ to both sides: $$x-10+10=-14+10$$ $$x=-4$$ Substitute this value of $x$ to equation 2: $$y = x + 5$$ $$y = -4 + 5$$ $$y=1$$ Use equation 1 to check: $$3x - 2y = -14$$ $$3(-4) - 2(1) = -14$$ $$-12 - 2 = -14$$ $$-14=-14$$
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