12. 3x1 + x2 - 3x3 X2 + 2x1 + 7x2 2x1 + 5x2 = = 6 X3 = -9 = -5

Elementary Algebra
17th Edition
ISBN:9780998625713
Author:Lynn Marecek, MaryAnne Anthony-Smith
Publisher:Lynn Marecek, MaryAnne Anthony-Smith
Chapter1: Foundations
Section1.3: Add And Subtract Integers
Problem 1.82TI: Subtract: (a) 74 (b) 7(4) .
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12. 3x1 +
x2 - 3x3
X2
+
2x1 + 7x2
2x1 + 5x2
= = 6
X3 = -9
= -5
Transcribed Image Text:12. 3x1 + x2 - 3x3 X2 + 2x1 + 7x2 2x1 + 5x2 = = 6 X3 = -9 = -5
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