2(X + 4) - 5(X - 6) + 9 = 7(X - 9)

Elementary Geometry For College Students, 7e
7th Edition
ISBN:9781337614085
Author:Alexander, Daniel C.; Koeberlein, Geralyn M.
Publisher:Alexander, Daniel C.; Koeberlein, Geralyn M.
Chapter1: Line And Angle Relationships
Section1.CT: Test
Problem 9CT: Given that 2x3=7. What reason allows the conclusion 2x=10?
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2(X + 4) - 5(X - 6) + 9 = 7(X - 9)

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