Tentukan nilai x dan y 1. 5x+3y=8 4x+2y=6 2.3y-5x=16 6x+4y=-20 3.12x-12y-13=0 4x+6y-1=0

1. 10x +6y = 16
12x +6y = 18
___________ -
-2x = -2
2x = 2
x = 1

5x+3y = 8
5+3y = 8
3y = 3
y = 1

2. 12y -20x = 64
12y + 18 x = 60
____________ +
-2x= 124. ×-1
2× = -124
x = -62

3y-5x = 16
3y -5(-62)= 16
3y +310= 16
3y = -294
y = -98

3. 12x-12y-13 = 0
8x+12y-2 = 0
___________ +
20x -15 = 0
20x = 15
x = 0.75

12x-12y-13 = 0
12(0.75) -12y = 13
9 -12y = 13
-12y = 13-9
-12y = 4
-3y =1