1/Х = а ; 1/y = b
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5a - 6b = 2
10a - 9b = 13
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5a = 6b + 2
10a = 12b + 4
10a = 9b + 13
12b + 4 = 9b + 13
3b = 9
b = 3
5a = 6b + 2
5a = 18 + 2
a = 20 : 5
a = 4
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1/x = a ; 1/y = b
1/x = 4 ; x = 1/4
1/y = 3 ; y = 1/3
Ответ ( 1/4 ; 1/3 )