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5x-3y=1
hacemos reduccion.
3(2x+y=7)............6x+3y=21
5x-3y=1...............5x-3y=1
11x=22.......x=22/11..............x=2
si x=2
2x+y=7
2(2)+y=7
4+y=7
y=7-4
y=3
solucion:
x=2 y=3