Obtain an equivalent system by performing the stated elementary operation on the system. Multiply the second equation by 1/3.   5x − 7y + 12z = 20 3x + 9y + 13z = 21 8x + 11y + 9z = 32

Elementary Linear Algebra (MindTap Course List)
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Chapter1: Systems Of Linear Equations
Section1.1: Introduction To Systems Of Linear Equations
Problem 90E: Consider the system of linear equations in x and y. ax+by=ecx+dy=f Under what conditions will the...
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Obtain an equivalent system by performing the stated elementary operation on the system. Multiply the second equation by 1/3.
 
5x 7y + 12z = 20
3x + 9y + 13z = 21
8x + 11y + 9z = 32
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