tolong dijawab sekarang mat wajib kls 11

1000x+400y=250.000
x+y=400

1000x+400y=250.000

5x+2y=1,250
x+y=400
------------------ y di kali 1&2
5x+2y=1,250
2x+2y=800
----------------- -
3x = 450
x=150


x+y=400
150+y=400
y=300