tolong bantuin doong.. pake cara cepet + gampang ya :v

2x + 5y = 13.500 ....(dikali 2)
4x + 3y = 16.500 ....( dikali 1)

4x + 10y = 27.000
4x + 3y = 16.500
_____________(-)
7y = 10.500
y = 1500

2x + 5(1500) = 13500
2x + 7500 = 13.500
2x = 6.000
x = 3.000

2x + 4y = 2(3000) + 4(1500)
= 6.000 + 6.000
= 12.000

2. jumlah ayam(x) dan kambing(y)
x + y = 15

jumlah kaki
2x + 4y = 46 atau x + 2y = 23

x + 2y = 23
x + y = 15
________(-)
y = 7
jumlah kambing 7 ekor