Sistem persamaan linear 3x-y=-7 dan 2x+3y=-1 mempunyai penyelesaian

6x - 2y = -14
6x + 9y = -3
--------------(kurangkan)
-11y = -11
y = 1

2x + 3y = -1
2x = -4
x = -2

Bab Persamaan Linear
Matematika SMP Kelas VIII

3x - y = - 7
y = 3x + 7

2x + 3y = - 1
2x + 3(3x + 7) = - 1
2x + 9x + 21 = -1
11x = -1 - 21
x = -22 : 11
x = -2

y = 3x + 7
y = 3 . (-2) + 7
y = 1

HP = {(-2, 1)}