x-3y=6 2x+4y=2 maka nilai x-y adalah

x -3y = 6 ➡ x = 3y +6
subtitusikan
2x +4y = 2
2(3y+6) +4y = 2
6y + 12 + 4y = 2
10y = 2-12
10y = -10
y = -1

x-3y = 6
x -(3×-1) = 6
x +3 = 6
x = 6-3
x = 3

nilai x -y = 3-(-1) = 4
semoga membantu