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Verified answer
PersamaaN GariS4x - 3y + 8 = 0 ---> m1 = -(-3)/4 = 3/4
tegak lurus ---> m2 = -1/m1 = -4/3
Persamaan garis dg gradien m2 = -4/3 dan mlalui (2,7) :
y - 7 = -4/3 (x - 2)
Kalikan silang
3y - 21 = -4x + 8
-4x - 3y + 29 = 0
atau
3y + 4x - 29 = 0
atau
y = -4/3 x + 29/3