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x^2 + 2y^2 = 22 (kali 2)
2x^2 + y^2 = 17
2x^2 + 4y^2 = 44
-------------------------- -
-3y^2 = -27
y^2 = 9
y=√9
y= 3
2x^2 + y^2 = 17
2x^2 +(3)^2 = 17
2x^2 + 9 = 17
2x^2 = 8
x^2 = 4
x=√4
x= 2
2x² + y² = 17
x² + 2y² = 22
persamaan pertama dikali 2
4x² + 2y² = 34
x² + 2y² = 22
kedua persamaan dikurangi
3x² = 12
x² = 4
x = 2
masukkan nilai x yaitu 2 kedalam salah satu persamaan
4 + 2y² = 22
2y² = 18
y² = 9
y = 3