Hey !
x² - 3y² = 1 ---------------- ( 1 )
3x² + 3y² = 15 -------------- ( 2 )
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Add equations ( 1 ) and ( 2 )
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we get,
4x² = 16
Dividing by 4 on both sides
x² = 4
x = √4
x = 2
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Substitute the value of x in any equation to get the value of y
( 2 )² - 3y² = 1
4 - 3y² = 1
-3y² = -3
y² = 1
y = 1
Hope my answer helps!
