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m=1-3/3-(-2)
m=-2/5
m1.m2=-1
-2/5.m2=-1
m2=-1.-5/2
m=5/2
y-y1=m(x-x1)
y-5=5/2(x-(-6)
y=5/2x+30/2+5
--------------------------kalikan 2
2y=5x+30+10
2y=5x+40
D(-2,d)
2y=5x+40
2.d=5.-2+40
2d=-10+40
2d=30
d=30/2
d=15
T(t,-5)
2y=5x+40
2.-5=5.t+40
-10=5t+40
-10-40=5t
-50=5t
-50/5=t
-10=t