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2x-y = 3 |x2| 4x-2y = 6
_________ +
5x = 10
x = 10/5
x = 2 --------> x+2y = 4
2+2y = 4
2y = 4-2
2y = 2
y = 2/2
y = 1
2x-y=3 | x2 | 4x-2y=6
------------+
5x = 10
x=10:5
x=2