October 2018 1 138 Report
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Método de sustitución:
A) Ec.1: 2x + y =5
Ec.2: 5x - 6y = 21

B) Ec.1: 7m - 4n= 21
Ec.2: -2m + 5n= -6

C) Ec.1: 4u - 5v - 4= 0
Ec.2: 3u + 8v= -3

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