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1) x + y = 3 (2)
2) 5x - 2y = 8 (1)
2x + 2y = 6
5x - 2y = 8
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7x + 0y = 14
7x = 14
x = 14/7
x = 2
El valor de x lo reemplazo en ecuación 1.
x + y = 3
2 + y = 3
y = 3 - 2
y = 1
Solución :
x = 2
y = 1
COMPROBAMOS :
x + y = 3
2 + 1 = 3
3 = 3
5x - 2y = 8
5 (2) - 2 (1) = 8
10 - 2 = 8
8 = 8
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