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------- _ ------
y2-y1 x2-x1
y+3 _ x-0
------ _ --------
0+3 5-0
y+3 _ x-0
----- _ -----
3 5
kali silang,,,,
5(y+3) = 3(x-0)
5y+15 = 3x-0
5y-3x+15=0
rumusnya yg utuh terlampir
jika kamu puas dengan jawaban ku beri "jawaban terbaik ya,,