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Verified answer
X + y = 123x - y = 4
---------------(+)
4x = 16
x = 4
x + y = 12 |×3
3x - y = 4
maka
3x + 3y = 36
3x - y = 4
-------------------(-)
4y = 40
y = 10
hp = ( 4,10)
3x= 4+y
3x=5
x=5/3
x=1.67