Answer
y=-5
Work Step by Step
Use mental math. What number added to 4 yields 9? $4+5=9$
Since y is negated in the equation, $y=-5$.
Algebra 1
by Hall, Prentice
Published by
Prentice Hall
ISBN 10:
0133500403
ISBN 13:
978-0-13350-040-0
Chapter 1 - Foundations for Algebra - 1-8 An Introduction to Equations - Practice and Problem-Solving Exercises - Page 57: 58
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