December 2018 1 8 Report
Ayuda son para mañana se resuelven por medio del método de sustitución
a)
2x-y=1
x+y=5

b)
x+y=4
2x-3y=3


c)
5x+2y=9
3x+y=5


d)
x-y=3
2x+4y=12


e)
x-2y=10
4x+4y=4

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