substitusi 2y+x=2 dan y-2x+14=0

Bab Persamaan Linear
Matematika SMP Kelas VIII

y - 2x + 14 = 0
y = 2x - 14

2y + x = 2
2 (2x - 14) + x = 2
4x - 28 + x = 2
5x = 2 + 28
x = 30/5
x = 6

y = 2x - 14
   = 2 . 6 - 14
   = 12 - 14
   = -2

HP = { (6, -2) }

2y+x=2. = 2y+x = 2
y-2x=-14. = 2y-4x =-28

=5x = 30
x = 6

2y + 6 = 2
2y = 2-6
2y = -4
y = -2