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4x + 5y = 10
5y = 10 - 4x
y = 2 - 4/5x
maka gradiennya -4/5
karena sejajar, maka m1 = m2
jadi gradien kedua garis sama sama -4/5
masukkan ke rumus :
y-y1 = m (x-x1)
y - 3 = -4/5 (x - (-1))
y - 3 = -4/5x -4/5
---------------------------x5
5y - 15 = -4x -4
4x + 5y = 11
Maaf kalau ada faktor salah menghitung
Salam :)