Solve the system by substitution. 8x + 9y = -28 -4x = y

Elementary Algebra
17th Edition
ISBN:9780998625713
Author:Lynn Marecek, MaryAnne Anthony-Smith
Publisher:Lynn Marecek, MaryAnne Anthony-Smith
Chapter5: Systems Of Linear Equations
Section5.2: Solve Systems Of Equations By Substitution
Problem 5.29TI: Solve the system by substitution. {4x+y=23x+2y=1
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Solve the system by substitution.
8х + 9y 3 — 28
-4x = y
Submit Answer
Transcribed Image Text:Solve the system by substitution. 8х + 9y 3 — 28 -4x = y Submit Answer
Expert Solution
Step 1

Given system is

8x+9y=-28       - (1)

and 

-4x=y     - (2)

Now substitute equation (2) into (1),

8x+9-4x=-288x-36x=-28-28x=-28x=1

 

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