kakak tolong bantu ya

3x + 2y = 280000 x1
x + 3y = 210000 x3
---------------------- -
3x + 2y = 280000
3x + 9y = 1890000
----------------------------- -
-7y=-1610000
y = 1.610.000/7
y = 230 000

keterangan:
c = celana
b = baju

menggunakan cara eliminasi
3c+2b = 280.000(×3)
1c +3b = 210.000 (×2)
_________________
9c + 6b = 840.000
2c + 6b = 420.000
________________ _
7c = 420.000
1c = 420.000:7
1c = 60.000

semoga bermanfaat