Himpunan penyelesaian sistem persamaan linear 1/x+2/y=1 dan 3/x+10/y= 4 adalah ??

Bisa kita misalkan 
1/x = a
1/y = b

maka


a + 2b = 1 (x3)
3a + 6b = 3
3a + 10b = 4
__________ -
       -4b = -1
          b = 1/4

a + 2b = 1
a+ 2(1/4) = 1
a = 2/2 - 1/2
a = 1/2

b = 1/4
1/y = 1/4
y = 4

a = 1/2
1/x = 1/2
x = 2

Hp = {2,4}