tolong dijawab ya,dijawabnya pake cara ya

Mapel : Matematika
Kelas : VIII SMP
Bab : SPLDV

Pembahasan :
1/x + 2/y = 10 —» (2/2x) + 4/y = 20
1/(2x) - 1/y = -1

Eliminasi...
2/(2x) + 4/y = 20
2/x - 4/y = -4
————————— (+)
2/2x + 2/x = 16
1/x + 2/x = 16
3/x = 16
x = 3/16

Substitusi...
1/x + 2/y = 10
1/(3/16) + 2/y = 10
16/3 + 2/y = 10
2/y = 10 - 16/3
2/y = 14/3
6 = 14y
y = 6/14
y = 3/7

Hp : {x , y} = {3/16 , 3/7}