Introductory Algebra for College Students (7th Edition)

Published by Pearson
ISBN 10: 0-13417-805-X
ISBN 13: 978-0-13417-805-9

Chapter 4 - Review Exercises: 19

Answer

{(20,-21)}

Work Step by Step

y=2x-61 Plug this value for y into the other equation. y=39-3x 2x-61=39-3x 2x+3x-61=39-3x+3x 5x-61=39 5x-61+61=39+61 5x=100 x=$\frac{100}{5}$ x=20 Plug this value for x into the first equation to find y. y=2(20)-61 y=40-61 y=-21 Therefore the solution is {(20,-21)}
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