metode subsitusix-3y=5 dan 3x+2y=-7

x-3y = 5
------------ (×3)
3x-9y = 15
3x+2y = -7
--------------- -
11y = 22
y = 22/11
y = 2

Maap kalo salah

x - 3y = 5 => x = 5+3y
3x + 2y = -7

x=5+3y disubstitusikan 3x+2y=-7

3x + 2y = -7
3(5+3y) +2y = -7
15 + 9y +2y = -7
9y +2y = -7-15
11y = -22
y = -2

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

jadi hp {(-1,-2)}