2x-y=8 ------------- 2X = 8 + Y ----------------- X = (8 + Y) / 2 ----- Ec. (1)
3x+2y=5 ------------------------------------------------------------------ Ec. (2)
3x+2y=5
3 (8 + Y) / 2 + 2Y = 5
24 + 3Y 2Y
--------- + ------------ = 5
2
24 + 3Y + 4Y
-------------------- = 5
2
24 + 7Y
------------- = 5
2
24 + 7Y = 5 (2)
24 + 7Y = 10
7Y = 10 - 24
7Y = -14
Y = -14/7
Y = -2
En la Ec (1)
2x-y=8
2X - (-2) = 8
2X + 2 = 8
2X = 8 - 2
2X = 6
X = 6/2
X = 3
