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: 7

Answer

The given ordered pair is not a solution.

Work Step by Step

We have $$3x+7y=-19$$ $$-6x=5y+8$$ Possible solution $(\frac{2}{3},-3)$ Substituting on Equation (1) $$3*\frac{2}{3}+7*(-3) = -19$$ $$2-21=-19$$ $$-19=-19$$ Substituting on Equation (2) $$-6*\frac{2}{3} = 5*(-3) +8$$ $$-4=-15+8$$ $$-4\ne-7$$ The given ordered pair is not a solution.
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