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2x-y-1=0
2x+5y-17=0
____________-
-6y+16=0
y=16/6=8/3
2x=8/3+1
x=11/6
rumusnya
y-y1=m(x-x1)
dimana
m=-2, x1=-11/6,y1=8/3
silakan dilanjutkan
semoga membantu ☺