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b = 19,5
pake cara subtitusi eliminasi
a+b=41 (22)2a+2b=82 _
4b =-78
b=-78/4=19 1/2
a+b=41
a+19 1/2=41
a =41-19 1/2
a =21 1/2
jadi Hp=(12 1/2,19 1/2)
Insyaallah bermanfaat