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3x-4y= -23
m = 3/4
Karena sejajar, maka m1 = m2
masukkan (-1 , 5) dan gradien ke persamaan:
5 = 3/4 . -1 + c
20/4 = -3/4 + c
c = 23/4
maka
y = 3/4 x + 23/4
4y = 3x + 23