bab persamaan garis please bntu jwb

Bab Persamaan Garis
Matematika SMP Kelas VIII

y - y1 = m (x - x1)
y - (-4) = (-2/3) (x - (-3))
3 (y + 4) = (-2) (x + 3)
3y + 12 = -2x - 6
2x + 3y + 12 + 6 = 0
2x + 3y + 18 = 0

a + b - c
= 2 + 3 - 18
= -13