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(x,y ) (x,y)
px+qy=1
= 3p-2y=1 ..... (1)
px+qy=1
= -5p+4y=1 ...... (2)
eliminasi
3p-2y=1 |x-2|
-5p+4y=1 |x1|
-6p+4y=2
-5p+4y=1
-------------- -
-p = 1
p = -1
-5(-1)+4q=1
4y = 1-5
y = 1
jadi p adalah -1 dan q adalah 1