Intermediate Algebra (6th Edition)

Published by Pearson
ISBN 10: 0321785045
ISBN 13: 978-0-32178-504-6

Chapter 4 - Section 4.1 - Solving Systems of Linear Equations in Two Variables - Exercise Set - Page 212: 62

Answer

Ordered Pair Solution $(-1,1)$

Work Step by Step

We have $$1)-0.7x+0.6y=1.3$$ $$2)0.5x-0.3y=-0.8$$ (1) + 2(2) $$-0.7+x+0.6y-0.6y=1.3-1.6$$ $$0.3x=-0.3$$ $$x=-1$$ Solving for $y$ $$y=(1.3+0.7(-1))\div0.6 = 1$$ Ordered Pair Solution $(-1,1)$
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