2x² + 3y² = 11
4x² + 6y² = 11x
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- 4x² - 6y² = - 22
- 4x² + 4x² - 6y² + 6y² = - 22 + 11x
0 = - 22 + 11x
11x = 22
x = 2
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2x² + 3y² = 11
2 * 4 + 3y² = 11
3y² = 11 - 8
y² = 3 : 3
y² = 1
y1 = 1
y2 = - 1
Ответ ( 2 ; - 1 ) ; ( 2 ; 1 )