Sistem persamaan linear 2 variabel 1. 2x-y=14 x+3y=0 2. 5x+2y=2 3x+y=2

Bab Persamaan Linear
Matematika
Kelas 8 SMP

"Persamaan Linear Dua Variabel"

Penyelesaian

1||

2x - y = 14
      -y = 14 - 2x (x -1)
       y = -14 + 2x

x + 3 (-14 + 2x) = 0
         x -42 + 6x = 0
                     7x = 42
                       x = 6

y = -14 + 2x
   = -14 + 2 (6)
   = -14 + 12
y = -2


2||

3x + y = 2
        y = 2 - 3x

5x + 2 (2 - 3x) = 2
     5x + 4 - 6x = 2
                   -x = -2  (x -1)
                    x = 2

y = 2 - 3x
   = 2 - 3 (2)
   = 2 - 6
y = -4

Semoga Membantu ^_^