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1. x - y = 3 (x3) 3x - 3y = 9
5x - 3 y = 19 (x1) 5x - 3y = 19
-2x = -10
x = 5
5 - y = 3
y = 2
2. 3x - 2y = 1 (x1) 3x - 2y = 1
-x + 5y = 4 (x3) -3x + 15y = 12
13 y = 13
y = 1
3x -2 = 1
3x = 3
x = 1