gradien dari garis yg persamaannya..

Kelas 8 Matematika
Bab Persamaan Garis

ax + by = c
m = -a/b

6 = 3 (x + 2y) - 3
6 + 3 = 3 (x + 2y)
x + 2y = 9/3
x + 2y = 3
a = 1; b = 2; c = 3

m = -a/b
m = -1/2

6 = 3(x + 2y)-3
6 = 3x + 6y - 3
6+3 = 3x + 6y
   9  = 3x + 6y
   6y = -3x + 9
     y = -3/6x + 9/6
     y = -1/2x + 3/2  (y = mx + c)
  
m = -1/2
 
Semoga Bermanfaat!!!