isi lah soal yg aku lingkari jawab pake cara!

15.
Raka = x
Adi = y

x = y + 1.500
x + y = 10.500

x + y = 10.500
y + 1.500 + y = 10.500
2y = 10.500 - 1.500
2y = 9.000
y = 4.500

Jawaban : A. Rp.4.500

16.
Bilangan Cacah = x

3x + 8 = 47
3x = 47 - 8
3x = 39
x = 13

Jawaban : B. 13

18.
Sapi = x
Kambing = y

x = 10y
2x + 8y = 11.900.000

2x + 8y = 11.900.000
20y + 8y = 11.900.000
28y = 11.900.000
y = 425.000

x = 10y
x = 10 × 425.000
x = 4.250.000

Jawaban : C. 4,25 juta

Maaf Kalau Salah

semoga membantu ya...

kalo ada yg blm paham tinggal dikomen aja ya ^^