Answer
3 and 4
Work Step by Step
Write the statements as equations
x + y = 7
x - y = -1
Solve the system by adding both equations together. You get:
2x = 6
x = 3
Plug x into x + y = 7
3 + y = 7
y = 4
College Algebra (6th Edition)
by Blitzer, Robert F.
Published by
Pearson
ISBN 10:
0-32178-228-3
ISBN 13:
978-0-32178-228-1
Chapter 5 - Systems of Equations and Inequalities - Exercise Set 5.1 - Page 527: 43
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