tentukan hp-nya 1. 3a-b+2c= 16 2. 2a+b+c= 1 3. 4a-2b+c= 18

1. 3a-b+2c = 16
b = 16-3a-2c ..................(4)

2. 2a+b+c = 1
2a+1(16-3a-2c)+c = 1
2a+16-3a-2c+c = 1
-a-c = -15........................(5)

3. 4a-2b+c = 18
4a-2(16-3a-2c)+c = 18
4a-32+6a+4c+c = 18
10a+5c = 50....................(6)

5. -a-c = -15
-c = -15+a
c = (-15+a): -1
c = 15-a

6. 10a+5(15-a) = 50
10a+75-5a = 50
5a = -25
a = -25:5
a = -5

7. c = 15-(-5)
c = 20

8. b = 16-3a-2c
b = 16-3(-5)-2(20)
b = 16+15-40
b = -9

HP = {a,b,c} = {-5,-9,20}