8x + 3у = -21
4x + 5y = -7
4x + 5y = -7 |:(2)
-8х - 10y = 14
-7y = -7| :(7)
У = 1
8x + 3 = -21
8х = -3 - 21
8х = -24 |:8
Х = -3
ОТВЕТ:(-3;1)
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8x + 3у = -21
4x + 5y = -7
8x + 3у = -21
4x + 5y = -7 |:(2)
8x + 3у = -21
-8х - 10y = 14
-7y = -7| :(7)
У = 1
8x + 3 = -21
8х = -3 - 21
8х = -24 |:8
Х = -3
ОТВЕТ:(-3;1)