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5x-6y=30
-6y=-5x+30
y=-5/-6 -5
y=5/6 -5
Jadi m nya 5/6 (c)
19. P(3,-2) dan (5,6)
y-y1/y2-y1 = x-x1/x2-x1
y+2/6+2 = x-3/5-3
y+2/8 = x-3/2
Terus di kali silang
8x-24 = 2y+4
8x-2y = 4+24
8x-2y = 28
Terus diperkecil dibagi 2
4x-y = 14
4x-y-14 = 0 (a)
Maaf yaa kalo salah