Algebra and Trigonometry 10th Edition

Published by Cengage Learning
ISBN 10: 9781337271172
ISBN 13: 978-1-33727-117-2

Chapter 10 - Review Exercises - Page 760: 17


$x=-0.2, y=0.7$

Work Step by Step

We write the system of equations as follows: $0.3x -0.1y=-0.13 \\ 0.2x-0.3y =-0.25$ We divide $R_1$ by $3$. The new system of equations is: $x -0.3333y=-0.4333 \\ 0.2x-0.3y =-0.25$ After solving the two equations, we have $ y=0.7$ Now, $0.3x -0.1(0.7)=-0.13 \implies x=-0.2$ Therefore, $x=-0.2, y=0.7$
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