Tentukan persamaan garis melalui titik (2,-1) dan sejajar garis 2y+2x=3

Kelas 8 Matematika
Bab Persamaan Garis

ax + by = c, sejajar, (p, q)
ax + by = ap + bq

2x + 2y = 3, sejajar, (2, -1)
2x + 2y = 2 . 2 + 2 . (-1)
2x + 2y = 4 - 2
2x +2y = 2
x + y = 1

titik (x1,y1) = (2,-1)
M1 = 2y+2x=3
2y=3-2x -> dibagi 2
y=3/2 - 1x
M1 = -1
*syarat sejajar : M1=M2
-1 = M2
*persamaan garis :
y-y1 = M (x - x1)
y-(-1) = -1 (x - 2)
y+1 = -x + 2
y = -x + 2 - 1
y+x = 1