persamaan garis melalui titk(-2,1) dan sejajar garis x-2y=3

2y = x - 3 ---> y = (1/2)x - 3/2
m = 1/2
y - y1 = m(x - x1)
y - 1 = (1/2)(x + 2)
2y - 2 = x + 2
2y = x + 4