Question

Guys please bantuannya no 9 sm 13.Pake cara yg mudah dipahami, jgn asal-asalan kalau ngga bisa jgn jawab.Terima kasih

Answer 1

9.
2y-x = -6
y = x + 3 => y - x = 3
=> 2y-x = 6
y-x = 3 -
______
y = 3

y = x + 3
=> 3 = x+3
=> x = 0

13.
4x-2y = 8
y-2x = 0 => -2x+y = 0
=> 4x-2y = 8
-2x+ y = 0 |×-1|
=> 4x - 2y = 8 |×-1|
2x - y = 0 |×2|
=> -4x+2y = -8
4x-2y = 0 +
________
0x = -8
x = tidak terdefinisi
y = tidak terdefinisi