Question

Tentukan HP dari

4x - 1/2y = 8
12x + 7y = -4

Answer 1

Verified answer

Mapel : Matematika
Kelas : VIII SMP
Bab : SPLDV

Pembahasan :
4x - 1/2y = 8
—» 8x - y = 16
—» 56x - 7y = 112

12x + 7y = -4

Eliminasi...
56x - 7y = 112
12x + 7y = -4
———————— (+)
68x = 108
x = 108/68
x = 54/34
x = 27/17

Substitusi...
12x + 7y = -4
12(27/17) + 7y = -4
324/17 + 7y = -4
7y = -4 - 324/17
7y = -68/17 - 324/17
7y = -392/17
y = -392/119

Hp : {27/17 , -392/119}