November 2018 1 57 Report
Resuelve las siguientes ecuaciones con la tecnica de suma y resta.

A) 2x + y= 5 B) 2x - 3y= -6
X - y= -2 5x - y= 11

C) 8x + y= 8 D) 5x + 4y= 2
3x - 2y= 16 4x + 5y= -2

E) 3m + 2n= 18
5m - 2n= 14

Ayuda xfa

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