1. Jika (x,y) memenuhi SPLDV, 4x - 3y = -3 dan 2x - 5y = 9, maka x-y adalah .. a. -3 c. 1 e. 6 b. 0 d. 3 2. Jika SPLDV, x - 6y = -10 dan x -

nomer 1 b dengan x=3&y=-3. nomer2gak ada jawabannya

1[]
4x - 3y = -3 ..... × 1
2x - 5y = 9 ..... ×2
◇◇◇◇◇◇◇◇◇◇◇◇◇
4x - 3x = -3
4x - 10y = 18
◇◇◇◇◇◇◇◇◇◇◇◇◇
7y = -21
y = -3

2x - 5y = 9
2x - 5(-3) = 9
2x - (-15) = 9
2x + 15 = 9
2x = 9 - 15
2x = -6
x = -3

Hp = { -3 }

x - y = -3 - (-3)
x - y = -3 + 3
x - y = 0 ( B )

2[]

x - 6y = -10
x - 2y = 18
◇◇◇◇◇◇◇◇◇◇
-4y = -28
y = 7

x - 2y = 18
x - 2(7) = 18
x - 14 = 18
x = 18 + 14
x = 32

Hp = { 32 , 7 }

x - y = 32 - 7
x - y = 25