tolong pke cara?????.....

disini kita ibaratkan ayam dgn x, dan itik dgn y.
dik:
7x + 6y =Rp336.250,00
2x + 3y =Rp125.000,00
dit: x = ?
jwb:
gunakan cara eliminasi
7x + 6y =Rp336.250,00
2x + 3y =Rp125.000,00 (dikali 2 Karena harus disamakan dlu salah satu variabel nya)
7x + 6y =Rp336.250,00
4x + 6y =Rp250.000,00
____________________--
3x = Rp86.250,00
x = Rp86.250,00 dibagi 3
x =Rp28.750,00

jdi, harga satu ayam = Rp28.750,00

7a + 6i = 3362502a + 3i = 1250002a = 125000 - 3ia = (125000 - 3i) / 27 x (125000 - 3i) / 2 + 6i = 3362507 x (125000 - 3i) / 2 = 336250 - 6i7 x (125000 - 3i) = 2 x (336250 - 6i)875000 - 21i = 672500 - 12i875000 - 672500 = 21i - 12i202500 = 9ii = 202500 / 9 = 22500

2a + 3i = 125000
2a + 3 x 22500 = 125000
2a + 67500 = 125000
2a = 125000 - 67500
a =  57500 / 2 = 28750
jawabannya adalah : B. Rp 28.750,00