tolong di jawab ya pakai cara!!!

[tex]5x + 3y = 21000 \: | \times 2| \\ 4x + 2y = 16000 \: | \times 3| \\ - - - - - - - - - - \\ 10x + 6y = 42000 \\ 12x + 6y = 48000 \\ - - - - - - - - ( - ) \\ - 2x = - 6000 \\ x = 3000 \\ cari \: y \\ 4(3000) + 2y = 16000 \\ 12000 + 2y = 16000 \\ 2y = 4000 \\ y = 2000 \\ jadi \\ 10x + 3y \\ 10(3000) + 2(2000) \\ 30000 + 4000 \\ 34000[/tex]

3x+y= -1 |×1|
x+3y=5 |×3|
_________
3x+y= -1
3x+9y=15
_________-
-8y=-16
y=2
cari x
x+3(2)=5
x+6=5
x=-1


Maaf kalo salah, semoga membantu