X - 2Y = - 8
2X + 3Y = 5
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методом сложения
- 2X + 4Y = - 16
2X + 3Y = 5
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- 2X + 2X + 4Y + 3Y = - 16 + 5
7Y = - 11
Y = - 11 : 7 = - 1 ( 4/7 )
X - 2 * ( - 11/7 ) = - 8
X + 22/7 = - 8
X = - 8 - ( 22/7 ) = - 8 - 3 ( 1/7 ) = - 11 ( 1/7 )
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ОТВЕТ ( - 11( 1/7 ) ; - 1 ( 4/7 ))