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1) 2x + y = 7
2) 3x - y = 3
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5x + 0y = 10
5x = 10
x = 10/5
x = 2
Reemplazo el valor de x en ecuación 1.
2x + y = 7
2 (2) + y = 7
4 + y = 7
y = 7 - 4
y = 3
Solución :
x = 2
y = 3