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9x - 2y = 73 . . . . . (a)

5x - 9y = 9 . . . . . (b)

(a)*9: 81x - 18y = 657

(b)*2: 10x - 18y = 18

Subtract: 71x = 639

so x = 9

Substitute in (a): 81 - 2y = 73

2y = 8

so y = 4

The ordered pair is (9, 4)

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12y ago

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