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sejajar 4x-2y+2=0
m1= -a/b = -4/-2 = 4/2 = 2
// m1=m2=2
x1=3 y1=5
y-y1= m(x-x1)
y-5= 2(x-3)
y= 2x-6+5
y= 2x-1
2x-y-1=0