1 {6x - 3y = 5
2 {3x + 6y = 5
multiplica la 1a. ecuacion po 2
2{6x - 3y = 5
{3x + 6y = 5
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12x - 6y = 10
3x +6y = 5
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15x + 0 = 15
despejar x
x = 15/ 15 = 1
x = 1
sustituir en la ecuacion (2)
3(1) + 6y = 5
3 + 6y = 5
despejar y
y = 5 - 3
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6
y = 2/6 = 1/3
(1, 1/3)