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x - y = 1 x 2 2x - 2y = 2 -
7y = 14
y = 2
2x + 5y = 16 x 1 2x + 5y = 16
x - y = 1 x 5 5x - 5y = 5 +
7x = 21
x = 3
Hp { 3 , 2 }
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