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De los datos:
las rectas:
L₁: 5x - y - 11 = 0
L₂: x + 3y + 1 = 0
Se halla punto P(x, y) de intersección al resolver sistema de ecuaciones:
5x - y = 11
x + 3y = - 1
3(5x - y) = 3(11)
x + 3y = - 1
15x - 3y = 33
x + 3y = - 1
-------------------
16x = 32
x = 32 / 16
x = 2
x + 3y = - 1
2 + 3y = - 1
3y = - 1 - 2
3y = - 3
y = - 3 / 3
y = - 1
P(x, y) = P(2, - 1)