Menghilangkan p p + 2q +4r =1 -p + 4q + 12r =0 2p + 8q +4r =1

Jawab:

2q + 20r = 2

Penjelasan dengan langkah-langkah:

p + 2q + 4r = 1

p = 1-2q-4r

-p + 4q + 12r = 0

-(1-2q-4r) + 4q + 12r = 0

-1+2q+4r + 4q + 12r = 0

6q + 16r = 1

2p + 8q + 4r =1

2(1-2q-4r) + 8q + 4r =1

2-4q-8r + 8q + 4r = 1

2 + 4q – 4r = 1

2 + 4q – 4r = 6q + 16r

2 = 2q + 20r