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(y-10)/(1-10) = (x+2)/(1+2)
(y-10)/-9 = (x+2)/3
(y-10)/-3 = (x+2)
y-10 = -3x-6
y = -3x-6+10
y = -3x+4
titik (3,d) terletak pada garis, mak
d = -3(3)+4
d = -9+4
d = -5