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: 61

Answer

Ordered Pair Solution $(-2,1)$

Work Step by Step

We have $$1)0.7x-0.2y=-1.6$$ $$2)0.2x-y=-1.4$$ (1)-0.2(2) $$0.7x-0.04x-0.2y+0.2y=-1.6+0.28$$ $$0.66x-1.32$$ $$x=-2$$ Solving for $y$ $$y=0.2*(-2)+1.4=1$$ Ordered Pair Solution $(-2,1)$
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