2X + 4Y - 7Y = 6 ---> 2X - 3Y = 6 ---> 3Y = 2X - 6
10X + 5Y - X = 2Y + 60 ---> 9X + 5Y = 2Y + 60 ---> 3Y = - 9X + 60
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2X - 6 = - 9X + 60
11X = 66
X = 6
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3Y = 12 - 6 --> 3Y = 6 ---> Y = 2
Ответ ( 6 ; 2 )